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href=\"https:\/\/tuohaihardware.com\/\">Home<\/a><details class=\"nav-dropdown\"><summary>Weldless Chain<\/summary><div class=\"nav-panel\"><a class=\"nav-overview\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/\">Weldless Chain<\/a><div class=\"nav-groups\"><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/lock-link-chain\/\">Lock Link Chain<\/a><\/div><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/double-loop-chain\/\">Double Loop Chain<\/a><div class=\"nav-leaf-list\"><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/double-loop-chain\/stainless-steel-double-loop-chain\/\">Stainless Steel Double Loop Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/double-loop-chain\/1-double-loop-chain\/\">#1 Double Loop Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/double-loop-chain\/2-double-loop-chain\/\">#2 Double Loop Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/double-loop-chain\/3-double-loop-chain\/\">#3 Double Loop Chains<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/double-loop-chain\/4-double-loop-chain\/\">#4 Double Loop Chain<\/a><\/div><\/div><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/jack-chain\/\">Jack Chain<\/a><div class=\"nav-leaf-list\"><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/jack-chain\/6-jack-chain\/\">#6 Jack Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/jack-chain\/8-jack-chain\/\">#8 Jack Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/jack-chain\/10-jack-chain\/\">#10 Jack Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/jack-chain\/12-jack-chain\/\">#12 Jack Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/jack-chain\/14-jack-chain\/\">#14 Jack Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/jack-chain\/16-jack-chain\/\">#16 Jack Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/jack-chain\/18-jack-chain\/\">#18 Jack Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/brass-jack-chain\/\">Brass Jack Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/jack-chain\/steel-jack-chain\/\">Steel Jack Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/jack-chain\/black-jack-chain\/\">Black Jack Chain<\/a><\/div><\/div><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/sash-chain\/\">Sash Chain<\/a><div class=\"nav-leaf-list\"><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/sash-chain\/stainless-steel-sash-chain\/\">Stainless Steel Sash Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/sash-chain\/steel-sash-chain\/\">Steel Sash Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/sash-chain\/copper-sash-chain\/\">Copper Sash Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/sash-chain\/sash-window-chain\/\">Sash Window Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/sash-chain\/8-sash-chain\/\">#8 Sash Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/sash-chain\/35-sash-chain\/\">#35 Sash Chain<\/a><\/div><\/div><\/div><\/div><\/details><details class=\"nav-dropdown\"><summary>Welded Chain<\/summary><div class=\"nav-panel\"><a class=\"nav-overview\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/\">Welded Chain<\/a><div class=\"nav-groups\"><div class=\"nav-group\"><span class=\"nav-group-title\">Grade<\/span><div class=\"nav-leaf-list\"><a class=\"\" href=\"https:\/\/tuohaihardware.com\/proof-coil-chain\/\">G30 Proof Coil Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/g43-chain\/\">G43 High Test Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/g70-transport-chain\/\">G70 Transport Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/g80-chain\/\">G80 Lifting Chains<\/a><\/div><\/div><div class=\"nav-group\"><span class=\"nav-group-title\">Material<\/span><div class=\"nav-leaf-list\"><a class=\"\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/alloy-chain\/\">Alloy Steel Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/carbon-steel-chain\/\">Carbon Steel Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/304-stainless-steel-chain\/\">304 Stainless Steel Chain<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/316-stainless-steel-chain\/\">316 Stainless Steel Chain<\/a><\/div><\/div><div class=\"nav-group\"><span class=\"nav-group-title\">Surface Treatment<\/span><div class=\"nav-leaf-list\"><a class=\"\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/zinc-plated-chain\/\">Zinc Plated Steel Chains<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/hot-dip-galvanized-chain\/\">Galvanized Steel Chains<\/a><span class=\"\">Brass Plated Welded Chains<\/span><a class=\"\" href=\"https:\/\/tuohaihardware.com\/plastic-coated-chain\/\">Plastic Coated Welded Chains<\/a><span class=\"\">Powder Coated Steel Chains<\/span><span class=\"\">Black Oxide Steel Chains<\/span><\/div><\/div><div class=\"nav-group\"><span class=\"nav-group-title\">Link Shape<\/span><div class=\"nav-leaf-list\"><a class=\"\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/long-link-chain\/\">Long Link Chains<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/short-link-chain\/\">Short Link Chains<\/a><a class=\"\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/straight-link-chain\/\">Straight Link Chains<\/a><span class=\"\">Passing Link Chains<\/span><\/div><\/div><\/div><\/div><\/details><details class=\"nav-dropdown\"><summary>Coil Spring<\/summary><div class=\"nav-panel\"><a class=\"nav-overview\" href=\"https:\/\/tuohaihardware.com\/coil-spring\/\">Coil Spring<\/a><div class=\"nav-groups\"><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/coil-spring\/compression-spring\/\">Compression Spring<\/a><\/div><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/coil-spring\/tension-spring\/\">Tension Spring<\/a><\/div><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/coil-spring\/torsion-spring\/\">Torsion Spring<\/a><\/div><\/div><\/div><\/details><details class=\"nav-dropdown\"><summary>Fasteners<\/summary><div class=\"nav-panel\"><div class=\"nav-groups\"><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/s-hooks\/\">S Hooks<\/a><\/div><\/div><\/div><\/details><details class=\"nav-dropdown\"><summary>Resource<\/summary><div class=\"nav-panel\"><div class=\"nav-groups\"><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/blog\/\">Blog<\/a><\/div><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/chain-manufacturing-equipment\/\">Equipment<\/a><\/div><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/about-us\/\">About Us<\/a><\/div><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/videos\/\">Video<\/a><\/div><div class=\"nav-group\"><a class=\"nav-group-title\" href=\"https:\/\/tuohaihardware.com\/faqs-page\/\">FAQs<\/a><\/div><\/div><\/div><\/details><a class=\"nav-top-link\" href=\"#contactPopUpForm\">Contact Us<\/a><\/nav><div class=\"header-actions\"><a class=\"header-cta\" href=\"#contactPopUpForm\">Instant Quote<\/a><\/div><\/div><\/header><section class=\"hero\"><div class=\"hero-main\"><div class=\"hero-image\" aria-hidden=\"true\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/tuohai-factory-workshop-wide.jpg\" alt=\"\"><\/div><div class=\"shell hero-shell\"><div class=\"hero-copy\"><p class=\"kicker\">Professional Chain Manufacturer<\/p><h1>Hardware Manufacturer in China<\/h1><p class=\"hero-statement\">Chains, springs &amp; wire forms.<\/p><p class=\"hero-lead\">Source standard chains, springs, and fittings\u2014or send a drawing or sample for a custom project review.<\/p><div class=\"hero-actions\"><a class=\"button button-light\" href=\"#products\">Explore Standard Products <\/a><a class=\"link-arrow link-arrow-light\" href=\"#contactPopUpForm\">Send a Drawing or Sample <\/a><\/div><\/div><\/div><\/div><div class=\"hero-metrics shell\"><div class=\"metric\"><div><strong>30<\/strong><b>YEARS<\/b><\/div><span>hardware industry experience stated by Tuohai<\/span><\/div><div class=\"metric\"><div><strong>150<\/strong><b>+<\/b><\/div><span>automated production lines across Taixing, Nantong, and Guangzhou<\/span><\/div><div class=\"metric\"><div><strong>200<\/strong><b>+<\/b><\/div><span>product options across the Tuohai range<\/span><\/div><\/div><\/section><section id=\"products\" class=\"section product-section\"><div class=\"shell\"><div class=\"section-intro\"><p class=\"eyebrow\">PRODUCT FAMILIES<\/p><h2 class=\"single-line-title\">Main Product<\/h2><p class=\"section-copy\">Compare the main product families below. If the exact item is not listed, send a drawing or sample for an initial review.<\/p><\/div><div class=\"product-grid\"><article class=\"product-family\"><a class=\"product-tile product-tile-featured\" href=\"https:\/\/tuohaihardware.com\/weldless-chain\/\"><div class=\"product-image\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/product-single-loop-chain-hd.jpg\" alt=\"Weldless Chains\" loading=\"lazy\"><\/div><div class=\"product-info\"><span>01<\/span><div><h3>Weldless Chains<\/h3><p>Start with our single loop chain, then confirm the size, material, finish, length, and packaging for your order.<\/p><\/div><b class=\"product-link-label\">View product family<\/b><\/div><\/a><\/article><article class=\"product-family\"><a class=\"product-tile\" href=\"https:\/\/tuohaihardware.com\/steel-chain\/\"><div class=\"product-image\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/welded-chain-detail.jpg\" alt=\"Welded Chains\" loading=\"lazy\"><\/div><div class=\"product-info\"><span>02<\/span><div><h3>Welded Chains<\/h3><p>Choose the grade, material, link shape, dimensions, and finish for industrial and general hardware use.<\/p><\/div><b class=\"product-link-label\">View product family<\/b><\/div><\/a><\/article><article class=\"product-family\"><a class=\"product-tile\" href=\"https:\/\/tuohaihardware.com\/coil-spring\/\"><div class=\"product-image\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/product-springs.jpg\" alt=\"Coil Springs\" loading=\"lazy\"><\/div><div class=\"product-info\"><span>03<\/span><div><h3>Coil Springs<\/h3><p>Compression, tension, and torsion springs for standard selection or a custom requirement.<\/p><\/div><b class=\"product-link-label\">View product family<\/b><\/div><\/a><\/article><article class=\"product-family\"><a class=\"product-tile\" href=\"https:\/\/tuohaihardware.com\/s-hooks\/\"><div class=\"product-image\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/product-fittings.jpg\" alt=\"Wire Forms &amp; Fittings\" loading=\"lazy\"><\/div><div class=\"product-info\"><span>04<\/span><div><h3>Wire Forms &amp; Fittings<\/h3><p>S hooks and connection parts made to an existing design, drawing, sample, or clear specification.<\/p><\/div><b class=\"product-link-label\">View product family<\/b><\/div><\/a><\/article><\/div><div class=\"original-product-links\"><a href=\"https:\/\/tuohaihardware.com\/weldless-chain\/double-loop-chain\/\">Double Loop Chains<\/a><a href=\"https:\/\/tuohaihardware.com\/weldless-chain\/jack-chain\/\">Jack Chains<\/a><a href=\"https:\/\/tuohaihardware.com\/weldless-chain\/sash-chain\/\">Sash Chains<\/a><a href=\"https:\/\/tuohaihardware.com\/steel-chain\/\">Welded Chains<\/a><a href=\"https:\/\/tuohaihardware.com\/coil-spring\/\">Springs<\/a><span>Connection Fittings<\/span><\/div><\/div><\/section><section id=\"about-tuohai\" class=\"section original-about\"><div class=\"shell original-about-grid\"><div class=\"about-workshop-photo\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/about-workshop-scaled.jpg\" alt=\"Chain production workshop with equipment and wire coils\" loading=\"lazy\"><\/div><div class=\"about-company-copy\"><div><p class=\"eyebrow\">ABOUT TUOHAI<\/p><h2>Professional Hardware Manufacturer<\/h2><\/div><div class=\"original-copy\"><p>Tuohai has been deeply engaged in the hardware industry for 30 years and possesses extensive experience in the production of chains and springs, capable of providing customers with a variety of high-quality hardware products, including welded chains, non-welded chains, wire-formed products, springs and various connecting accessories.<\/p><p style=\"text-align: left\">We hold more than a dozen patents, have 150+ automated production lines in Taixing, Nantong, and Guangzhou, capable of offering more than 200 products for customers, and we also accept various customizations, including materials, sizes, surface treatments, packaging, etc.<\/p><a class=\"link-arrow\" href=\"#contactPopUpForm\">Learn More<\/a><\/div><\/div><\/div><\/section><section id=\"why-tuohai\" class=\"section original-reasons\"><div class=\"shell\"><div class=\"section-intro\"><p class=\"eyebrow\">WHY TUOHAI<\/p><h2>Why 1000+ Clients Choose Tuohai?<\/h2><\/div><div class=\"original-reason-grid\"><article><div class=\"reason-heading-mark\"><span class=\"reason-icon\" aria-hidden=\"true\"><svg width=\"26\" height=\"26\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M20 13 13 20a2 2 0 0 1-3 0l-7-7V3h10l7 7a2 2 0 0 1 0 3Z\"\/><circle cx=\"7.5\" cy=\"7.5\" r=\"1\"\/><\/svg><\/span><span class=\"original-number\">01<\/span><\/div><h3>Affordable Prices<\/h3><p>Thanks to the popularity of automation in metal hardware production lines, Tuohai can offer the most competitive prices while ensuring product quality.<\/p><\/article><article><div class=\"reason-heading-mark\"><span class=\"reason-icon\" aria-hidden=\"true\"><svg width=\"26\" height=\"26\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"8\" r=\"5\"\/><path d=\"m8 12-1 9 5-3 5 3-1-9m-6-4 1.5 1.5L14 7\"\/><\/svg><\/span><span class=\"original-number\">02<\/span><\/div><h3>Patents and Certifications<\/h3><p>All of our products are certified with ISO, TUV, RoHS, and more. Furthermore, after decades of continuous R&amp;D, we hold more than ten proprietary patents.<\/p><\/article><article><div class=\"reason-heading-mark\"><span class=\"reason-icon\" aria-hidden=\"true\"><svg width=\"26\" height=\"26\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12 3 4 6v6c0 5 8 9 8 9s8-4 8-9V6l-8-3Z\"\/><path d=\"m8 12 3 3 5-6\"\/><\/svg><\/span><span class=\"original-number\">03<\/span><\/div><h3>Rigorous Testing<\/h3><p>Tuohai has a comprehensive testing system, including tensile testing and salt spray testing. All products must be tested before being packaged and shipped.<\/p><\/article><article><div class=\"reason-heading-mark\"><span class=\"reason-icon\" aria-hidden=\"true\"><svg width=\"26\" height=\"26\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M3 6h12v11H3zm12 4h4l3 4v3h-7M1 10h5M1 13h4\"\/><circle cx=\"7\" cy=\"18\" r=\"2\"\/><circle cx=\"18\" cy=\"18\" r=\"2\"\/><\/svg><\/span><span class=\"original-number\">04<\/span><\/div><h3>Quick Delivery<\/h3><p>Tuohai&#8217;s self-developed fully automated hardware production lines significantly shorten the production cycle, saving you a lot of time.<\/p><\/article><article><div class=\"reason-heading-mark\"><span class=\"reason-icon\" aria-hidden=\"true\"><svg width=\"26\" height=\"26\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M4 13V11a8 8 0 0 1 16 0v6c0 3-3 4-7 4\"\/><rect x=\"2\" y=\"11\" width=\"4\" height=\"7\" rx=\"2\"\/><rect x=\"18\" y=\"11\" width=\"4\" height=\"7\" rx=\"2\"\/><path d=\"M11 21h3\"\/><\/svg><\/span><span class=\"original-number\">05<\/span><\/div><h3>24\/7 Service<\/h3><p>We have an experienced sales team available around the clock to provide online services for you. All of your emails or messages will be replied to within 1 hour.<\/p><\/article><article><div class=\"reason-heading-mark\"><span class=\"reason-icon\" aria-hidden=\"true\"><svg width=\"26\" height=\"26\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect x=\"2\" y=\"5\" width=\"20\" height=\"15\" rx=\"3\"\/><path d=\"M2 10h20M6 15h4m4 0h3\"\/><\/svg><\/span><span class=\"original-number\">06<\/span><\/div><h3>Flexible Payment Methods<\/h3><p>We accept various payment methods, including T\/T, letters of credit, Western Union, PayPal, etc., and can accept payments in RMB, USD, or other currencies.<\/p><\/article><\/div><\/div><\/section><section id=\"manufacturing\" class=\"section capability-section\"><div class=\"shell\"><div class=\"section-intro section-intro-inverse\"><p class=\"eyebrow\">MANUFACTURING &amp; CUSTOMIZATION<\/p><h2 class=\"single-line-title\">Advanced Equipment<\/h2><p class=\"section-copy\">Professional hardware production \u2014 chains, springs and wire-formed products.<\/p><\/div><div class=\"capability-layout\"><div class=\"capability-photo\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/tuohai-chain-production-workshop.jpg\" alt=\"Tuohai chain production workshop with wire coils and forming equipment\"><span>TUOHAI CHAIN PRODUCTION WORKSHOP<\/span><button class=\"factory-video-trigger\" type=\"button\" aria-haspopup=\"dialog\" aria-controls=\"factory-video-dialog\"><span aria-hidden=\"true\">\u25b6<\/span><b>Watch Factory Video<\/b><\/button><\/div><div class=\"capability-content\"><div class=\"original-copy original-copy-inverse\"><p>Tuohai has a team of experienced engineers and technicians who, through over a decade of continuous R&amp;D efforts, have greatly upgraded our production equipment. Our hardware products production lines have achieved full automation, especially the chain and wire-form production line, which operates 24\/7 without human supervision. All the advanced equipment not only greatly enhances our production efficiency and shortens production cycles but also ensures the precision of product dimensions, thereby significantly improving product quality.<\/p><p>We supply chains, springs, wire-formed products, and connection fittings in a range of materials, sizes, and finishes for different applications.<\/p><a class=\"link-arrow link-arrow-light\" href=\"#contactPopUpForm\">Send Your Inquiry Now<\/a><\/div><\/div><\/div><\/div><\/section><section id=\"quality\" class=\"section quality-section\"><div class=\"shell quality-grid\"><div class=\"quality-image\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/chain-link-production-detail-scaled.jpg\" alt=\"Chain link detail beside production equipment\"><div><span>CHAIN DETAIL<\/span><b>Chain links beside production equipment<\/b><\/div><\/div><div class=\"quality-copy\"><p class=\"eyebrow\">QUALITY &amp; DOCUMENTS<\/p><h2>Rigorous Quality Control<\/h2><p>Quality is always Tuohai\u2019s top priority. Each batch of materials is required to come with the material certificate and undergo multiple tests. Only the materials that pass all tests are stored and preserved for use.<\/p><p>During the manufacturing process, we conduct random inspections to ensure that the products at each stage meet our standards. After production, they will be inspected again, and only the products that fully meet the requirements are packaged and shipped. Moreover, all unqualified products must be scrapped, and the processes causing the issues should be thoroughly investigated and promptly resolved.<\/p><div class=\"quality-list\"><span>Material documents<\/span><span>Critical dimensions<\/span><span>Tensile testing<\/span><span>Salt spray testing<\/span><span>Packaging marks<\/span><span>Final inspection<\/span><\/div><a class=\"link-arrow\" href=\"#contactPopUpForm\">Share your acceptance criteria <\/a><\/div><\/div><div class=\"shell quality-certificates\"><div class=\"original-certificates\" aria-label=\"Certifications shown on the original homepage\"><div class=\"certificate-logo\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/CE.jpg\" alt=\"CE\"><\/div><div class=\"certificate-logo\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/CSA.jpg\" alt=\"CSA\"><\/div><div class=\"certificate-logo\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/ISO.jpg\" alt=\"ISO\"><\/div><div class=\"certificate-logo\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/RoHS.jpg\" alt=\"RoHS\"><\/div><div class=\"certificate-logo\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/TUV.jpg\" alt=\"TUV\"><\/div><\/div><\/div><\/section><section id=\"custom\" class=\"section route-section\"><div class=\"shell original-custom-grid\"><div><p class=\"eyebrow\">CUSTOM MANUFACTURING<\/p><h2>Comprehensive Customization Services<\/h2><div class=\"metric custom-metric\"><div><strong>Flexible Customization<\/strong><\/div><span>Customize material, size, finish, packaging, and more.<\/span><\/div><\/div><div class=\"original-copy\"><p>Tuohai provides full customization services of products to meet your specific requirements regarding materials, dimensions, shapes, and surface treatments. We can produce products according to your drawing or the samples. Our production capacity covers a wide range of products from standard to special shapes, including but not limited to oversized various welded and weldless chains, metal springs, or connecting fittings.<\/p><p>Furthermore, we offer customized packaging services, including type, size, and the option to print your LOGO on the packaging, enhancing your product\u2019s brand image.<\/p><a class=\"link-arrow\" href=\"#contactPopUpForm\">Send Your Inquiry Now<\/a><\/div><\/div><\/section><section id=\"industries\" class=\"section industries-section\"><div class=\"shell industries-layout\"><div class=\"industries-heading\"><p class=\"eyebrow\">APPLICATIONS &amp; BUYERS<\/p><h2>Built for the job.<br>Planned for the order.<\/h2><p>Product choice is only one part of the enquiry. Application, handling, documents, packaging, and destination can change what needs to be confirmed.<\/p><a class=\"link-arrow\" href=\"#contactPopUpForm\">Discuss Your Requirements<\/a><\/div><div class=\"application-list\"><article><span>01<\/span><div><h3>Lighting &amp; Display<\/h3><p>Decorative chain, hanging chain, light-duty chain, and related connection parts.<\/p><\/div><\/article><article><span>02<\/span><div><h3>General Hardware<\/h3><p>Chain, springs, hooks, rings, and wire-formed parts for everyday hardware use.<\/p><\/div><\/article><article><span>03<\/span><div><h3>Industrial Equipment<\/h3><p>Parts reviewed around load, dimensions, material, finish, and working conditions.<\/p><\/div><\/article><article><span>04<\/span><div><h3>Retail &amp; Distribution<\/h3><p>Product selection and packaging planned around storage, handling, and resale.<\/p><\/div><\/article><\/div><\/div><\/section><section id=\"process\" class=\"section process-section\"><div class=\"shell\"><div class=\"section-intro section-intro-inverse\"><p class=\"eyebrow\">FROM REQUIREMENT TO DELIVERY<\/p><h2 class=\"single-line-title\">A clear path to repeat orders.<\/h2><p class=\"section-copy\">Each stage reduces assumptions and keeps the confirmed details connected from enquiry through packing.<\/p><\/div><div class=\"process-visual-layout\"><div class=\"process-shipment-image\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/forklift-shipment-scaled.jpg\" alt=\"Forklift loading wrapped pallets onto a truck\" loading=\"lazy\"><\/div><div class=\"process-grid\"><article class=\"process-card\"><span>01<\/span><h3>Define the requirement<\/h3><p>Share the product, application, dimensions, material, finish, quantity, and destination.<\/p><\/article><article class=\"process-card\"><span>02<\/span><h3>Review and confirm<\/h3><p>Check the selected item, drawing, sample, testing needs, and packaging details.<\/p><\/article><article class=\"process-card\"><span>03<\/span><h3>Produce and inspect<\/h3><p>Follow the confirmed details and the checks agreed for the specific order.<\/p><\/article><article class=\"process-card\"><span>04<\/span><h3>Pack and deliver<\/h3><p>Match packaging and shipment to handling, storage, timing, and destination.<\/p><\/article><\/div><\/div><div class=\"process-note\"><span>BEFORE YOU ORDER<\/span><p>Ask us to confirm any required material documents, dimensions, tensile test, salt spray test, packaging marks, or other acceptance criteria.<\/p><a href=\"https:\/\/tuohaihardware.com\/faqs-page\/\">Review FAQs <\/a><\/div><\/div><\/section><section id=\"packaging-options\" class=\"section original-packaging\"><div class=\"shell\"><div class=\"section-intro\"><p class=\"eyebrow\">PACKAGING OPTIONS<\/p><h2>Part of Customizable Packaging Options from Tuohai<\/h2><\/div><div class=\"packaging-accordion\"><article class=\"packaging-item\"><h3><button type=\"button\" id=\"packaging-button-0\" aria-expanded=\"true\" aria-controls=\"packaging-panel-0\"><span class=\"packaging-number\">01<\/span><span>Reel Packaging<\/span><span class=\"packaging-toggle\" aria-hidden=\"true\"><\/span><\/button><\/h3><div class=\"packaging-panel\" id=\"packaging-panel-0\" role=\"region\" aria-labelledby=\"packaging-button-0\"><div class=\"original-packaging-image\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/packaging-reel-cutout.png\" alt=\"Reel Packaging\"><\/div><div class=\"packaging-description\"><p>This is a very popular packaging option for chains, the color and size of the reel can be customized, and the length of the chain can also be cut according to customer. This packaging method allows the product to be displayed and sold on shelves upon receipt directly, with no need for secondary packaging and greatly facilitates our retail customers.<\/p><a class=\"link-arrow\" href=\"#contactPopUpForm\">Discuss This Packaging<\/a><\/div><\/div><\/article><article class=\"packaging-item\"><h3><button type=\"button\" id=\"packaging-button-1\" aria-expanded=\"false\" aria-controls=\"packaging-panel-1\"><span class=\"packaging-number\">02<\/span><span>Bucket Packaging<\/span><span class=\"packaging-toggle\" aria-hidden=\"true\"><\/span><\/button><\/h3><div class=\"packaging-panel\" id=\"packaging-panel-1\" role=\"region\" aria-labelledby=\"packaging-button-1\" hidden><div class=\"original-packaging-image\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/packaging-bucket-cutout.png\" alt=\"Bucket Packaging\"><\/div><div class=\"packaging-description\"><p>Bucket packaging comes in two types: plastic buckets and metal barrels, primarily used for chains. Metal barrels are often used for welded chains, while plastic buckets are more suitable for weldless chains. The lid of the plastic bucket usually has a cross-shaped hole, making it easy to pull out the chain through it when selling.<\/p><a class=\"link-arrow\" href=\"#contactPopUpForm\">Discuss This Packaging<\/a><\/div><\/div><\/article><article class=\"packaging-item\"><h3><button type=\"button\" id=\"packaging-button-2\" aria-expanded=\"false\" aria-controls=\"packaging-panel-2\"><span class=\"packaging-number\">03<\/span><span>Carton Packaging<\/span><span class=\"packaging-toggle\" aria-hidden=\"true\"><\/span><\/button><\/h3><div class=\"packaging-panel\" id=\"packaging-panel-2\" role=\"region\" aria-labelledby=\"packaging-button-2\" hidden><div class=\"original-packaging-image\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/packaging-carton-cutout.png\" alt=\"Carton Packaging\"><\/div><div class=\"packaging-description\"><p>As a common packaging method, cartons are widely used for packaging chains, springs, and connection fittings. Products can be directly placed into it, or the carton can be used as outer packaging for reels, bags, and other types of packaging. We can also print the customer\u2019s LOGO or other patterns on the carton.<\/p><a class=\"link-arrow\" href=\"#contactPopUpForm\">Discuss This Packaging<\/a><\/div><\/div><\/article><article class=\"packaging-item\"><h3><button type=\"button\" id=\"packaging-button-3\" aria-expanded=\"false\" aria-controls=\"packaging-panel-3\"><span class=\"packaging-number\">04<\/span><span>Bundled Packaging<\/span><span class=\"packaging-toggle\" aria-hidden=\"true\"><\/span><\/button><\/h3><div class=\"packaging-panel\" id=\"packaging-panel-3\" role=\"region\" aria-labelledby=\"packaging-button-3\" hidden><div class=\"original-packaging-image\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/bundled-chain-packaging-scaled.jpg\" alt=\"Bundled Packaging\"><\/div><div class=\"packaging-description\"><p>This is the most cost-effective packaging method, cut the chain to a specified length, then bundle it together with wire, and place it into the wooden boxe pallet directly for transportation and storage. This packaging method is suitable for bulk purchases of chains, maximizing space utilization and saving on transportation costs.<\/p><a class=\"link-arrow\" href=\"#contactPopUpForm\">Discuss This Packaging<\/a><\/div><\/div><\/article><article class=\"packaging-item\"><h3><button type=\"button\" id=\"packaging-button-4\" aria-expanded=\"false\" aria-controls=\"packaging-panel-4\"><span class=\"packaging-number\">05<\/span><span>Bag Packaging<\/span><span class=\"packaging-toggle\" aria-hidden=\"true\"><\/span><\/button><\/h3><div class=\"packaging-panel\" id=\"packaging-panel-4\" role=\"region\" aria-labelledby=\"packaging-button-4\" hidden><div class=\"original-packaging-image\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/packaging-bag-cutout.png\" alt=\"Bag Packaging\"><\/div><div class=\"packaging-description\"><p>Bag packaging is divided into burlap sacks and PP bags. Burlap sacks are commonly used for welded chains, connection accessories, and springs, the PP bags are more suitable for weldless chains or smaller connection fittings, such as S Hooks, Spring Hooks, Swivel Hooks, Cotter Pins, and similar products.<\/p><a class=\"link-arrow\" href=\"#contactPopUpForm\">Discuss This Packaging<\/a><\/div><\/div><\/article><article class=\"packaging-item\"><h3><button type=\"button\" id=\"packaging-button-5\" aria-expanded=\"false\" aria-controls=\"packaging-panel-5\"><span class=\"packaging-number\">06<\/span><span>Pallet Wooden Box Packaging<\/span><span class=\"packaging-toggle\" aria-hidden=\"true\"><\/span><\/button><\/h3><div class=\"packaging-panel\" id=\"packaging-panel-5\" role=\"region\" aria-labelledby=\"packaging-button-5\" hidden><div class=\"original-packaging-image\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/packaging-pallet-cutout.png\" alt=\"Pallet Wooden Box Packaging\"><\/div><div class=\"packaging-description\"><p>Pallet boxes are commonly used for outer packaging, designed with a pallet at the bottom for easy loading and unloading. The wooden box made from plywood, is suitable for export to any country or region. Its sturdy structure can protect the products inside. The exterior is usually wrapped with stretch film to ensure the packaging is sealed, preventing rust during transportation.<\/p><a class=\"link-arrow\" href=\"#contactPopUpForm\">Discuss This Packaging<\/a><\/div><\/div><\/article><\/div><\/div><\/section><section id=\"logistics-delivery\" class=\"section delivery-section\"><div class=\"shell delivery-grid\"><div class=\"delivery-copy\"><p class=\"eyebrow\">LOGISTICS &amp; DELIVERY<\/p><h2>Efficient Logistics and Global Distribution<\/h2><p>Tuohai is located near the Shanghai Port, our goods can reach the port quickly without mid-transit, saving both time and costs.<\/p><p>Through years of development, we have established solid partnerships with top logistics companies. Whether you choose express, air freight, sea freight, container trucking, rail, or other transport, we offer flexible logistics solutions. Importantly, no matter where you are in the world, we ensure your products are delivered safely and swiftly to the specified location.<\/p><a class=\"link-arrow\" href=\"#contactPopUpForm\">Discuss Your Delivery Requirements<\/a><\/div><div class=\"delivery-photo\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/tuohai-container-loading.jpg\" alt=\"Tuohai chain reels loaded inside a shipping container\"><div><span>DELIVERY<\/span><b>Container loading for an actual shipment<\/b><\/div><\/div><\/div><\/section><section id=\"customers\" class=\"section original-testimonials\"><div class=\"shell\"><div class=\"section-intro\"><p class=\"eyebrow\">CUSTOMERS OF TUOHAI<\/p><h2>Customer Feedback<\/h2><\/div><div class=\"original-testimonial-grid\"><figure><blockquote><p>Hey, Huge thanks for rushing our order and beating the deadline! You guys rock. Really saved us there. Appreciate your hard work and quick action!<\/p><p>Cheers<\/p><\/blockquote><figcaption><img loading=\"lazy\" decoding=\"async\" class=\"customer-avatar\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/Customers.png\" alt=\"Customers of Tuohai\" width=\"64\" height=\"64\"><div><strong>Jordan Smith<\/strong><span>Purchasing Manager<\/span><\/div><\/figcaption><\/figure><figure><blockquote><p>K\u00e4ra Vivian,<\/p><p>I fem \u00e5r har ni med erat enast\u00e5ende kvalitetsarbete gjort att min verksamhet st\u00e4ndigt v\u00e4xer. Jag, Lars Andersson, \u00e4r djupt tacksam f\u00f6r ert h\u00e5rda arbete och dedikation. Inf\u00f6r det nya \u00e5ret \u00f6nskar jag oss fortsatt framg\u00e5ng och ett starkt partnerskap.<\/p><p>Gott Nytt \u00c5r och varma h\u00e4lsningar, Lars Andersson<\/p><\/blockquote><figcaption><img loading=\"lazy\" decoding=\"async\" class=\"customer-avatar\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/Customers.png\" alt=\"Customers of Tuohai\" width=\"64\" height=\"64\"><div><strong>Lars Andersson<\/strong><span>\u00c4gare till Anderssons J\u00e4rnhandel<\/span><\/div><\/figcaption><\/figure><\/div><\/div><\/section><section id=\"resources\" class=\"section resource-section\"><div class=\"shell\"><div class=\"section-intro\"><p class=\"eyebrow\">RESOURCE CENTER<\/p><h2>Make the next decision with better information.<\/h2><p class=\"section-copy\">Use product guidance, ordering questions, equipment information, and direct project review to narrow the requirement.<\/p><\/div><div class=\"resource-grid\"><a href=\"https:\/\/tuohaihardware.com\/blog\/\"><div class=\"resource-image\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/resource-single-loop-guide.jpg\" alt=\"Single loop chain sample on a clean work surface\"><\/div><div class=\"resource-card-body\"><span>01<\/span><h3>Product Knowledge<\/h3><p>Compare product types, materials, finishes, and common selection points.<\/p><\/div><\/a><a href=\"https:\/\/tuohaihardware.com\/faqs-page\/\"><div class=\"resource-image\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/chain-barrel-packing-scaled.jpg\" alt=\"Chains packed in drums inside a wooden crate\"><\/div><div class=\"resource-card-body\"><span>02<\/span><h3>Ordering FAQs<\/h3><p>Review the information that helps the team check an enquiry and prepare a useful reply.<\/p><\/div><\/a><a href=\"https:\/\/tuohaihardware.com\/equipment\/\"><div class=\"resource-image\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/10\/wire-production-detail-scaled.jpg\" alt=\"Metal wire coils on production equipment\"><\/div><div class=\"resource-card-body\"><span>03<\/span><h3>Equipment &amp; Production<\/h3><p>See the production background behind standard and custom hardware orders.<\/p><\/div><\/a><a href=\"#contactPopUpForm\"><div class=\"resource-image\"><img decoding=\"async\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/resource-custom-wire-form.jpg\" alt=\"Custom wire-formed sample held for review\"><\/div><div class=\"resource-card-body\"><span>04<\/span><h3>Project Review<\/h3><p>Send a drawing, sample, or specification when an existing product is not the right fit.<\/p><\/div><\/a><\/div><\/div><\/section><section class=\"quote-section\"><div class=\"shell quote-grid\"><div class=\"quote-copy\"><p class=\"eyebrow eyebrow-light\">START A PROJECT<\/p><h2>Send enough detail for a useful first review.<\/h2><p>Tell us what the part needs to do and what must be confirmed. A drawing or sample is helpful for custom work.<\/p><ul><li>Product name or drawing<\/li><li>Material and critical dimensions<\/li><li>Quantity, finish, and packaging<\/li><li>Tests, documents, and destination<\/li><\/ul><div class=\"direct-contact\"><span>DIRECT CONTACT<\/span><a href=\"mailto:vivianzhou@tuohaichain.com\">vivianzhou@tuohaichain.com<\/a><a href=\"tel:+8615052882651\">+86 150 5288 2651<\/a><\/div><\/div><div class=\"quote-card\" aria-label=\"Request a quote\"><div class=\"quote-card-head\"><span>QUICK QUOTE<\/span><\/div><h3>Get an Instant Quote<\/h3><div id=\"quote-preview-form\"><div class='fluentform ff-default fluentform_wrapper_4 ffs_default_wrap'><form data-form_id=\"4\" id=\"fluentform_4\" class=\"frm-fluent-form fluent_form_4 ff-el-form-top ff_form_instance_4_1 ff-form-loading ffs_default\" data-form_instance=\"ff_form_instance_4_1\" method=\"POST\" ><fieldset  style=\"border: none!important;margin: 0!important;padding: 0!important;background-color: transparent!important;box-shadow: none!important;outline: none!important; 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Standard products and custom requirements.<\/p><div class=\"footer-social\"><a href=\"https:\/\/www.youtube.com\/channel\/UCQqEdTc56GUMfI4GegVjFKQ\">YouTube \u2197<\/a><a href=\"https:\/\/www.linkedin.com\/in\/tuohaihardware\/\">LinkedIn \u2197<\/a><\/div><\/div><div><h2>PRODUCTS<\/h2><nav aria-label=\"Footer products\"><a href=\"https:\/\/tuohaihardware.com\/weldless-chain\/\">Weldless Chain<\/a><a href=\"https:\/\/tuohaihardware.com\/steel-chain\/\">Welded Chain<\/a><a href=\"https:\/\/tuohaihardware.com\/coil-spring\/\">Coil Spring<\/a><a href=\"https:\/\/tuohaihardware.com\/s-hooks\/\">Connection Fittings<\/a><\/nav><\/div><div><h2>SUPPORT<\/h2><nav aria-label=\"Footer support\"><a href=\"https:\/\/tuohaihardware.com\/about-us\/\">About Us<\/a><a href=\"https:\/\/tuohaihardware.com\/faqs-page\/\">FAQs<\/a><a href=\"https:\/\/tuohaihardware.com\/videos\/\">Factory Videos<\/a><a href=\"#contactPopUpForm\">Contact Us<\/a><\/nav><\/div><div class=\"footer-contact\"><h2>LET\u2019S TALK<\/h2><a class=\"footer-email\" href=\"mailto:vivianzhou@tuohaichain.com\">vivianzhou@tuohaichain.com<\/a><a href=\"tel:+8615052882651\">+86 150 5288 2651<\/a><p>#118 Puhuang RD<br>Nantong City, Jiangsu Province, China<\/p><a class=\"link-arrow\" href=\"#contactPopUpForm\">Send Your Inquiry<\/a><\/div><\/div><div class=\"shell original-copyright\"><span>\u00a9 2026 Tuohai Hardware. All rights reserved.<\/span><span>Chains \u00b7 Springs \u00b7 Wire-formed Parts<\/span><\/div><\/footer><\/main><dialog id=\"factory-video-dialog\" class=\"factory-video-dialog\" aria-labelledby=\"factory-video-title\"><div class=\"factory-video-bar\"><h2 id=\"factory-video-title\">Factory Video<\/h2><button type=\"button\" class=\"factory-video-close\" aria-label=\"Close video\">\u00d7<\/button><\/div><div class=\"factory-video-player\"><\/div><div class=\"factory-video-fallback\"><a href=\"https:\/\/youtu.be\/1Huk6c5IgRs\" target=\"_blank\" rel=\"noopener\">Watch on YouTube \u2197<\/a><\/div><\/dialog><\/div><script>(()=>{const root=document.getElementById('th-home-11881');if(!root)return;const byId=id=>root.querySelector('#'+id);const capabilities=[{\"id\":\"production\",\"label\":\"Production\",\"image\":\"\/tuohai-chain-production-workshop.jpg\",\"imageAlt\":\"Tuohai chain production workshop with wire coils and forming equipment\",\"imageCaption\":\"TUOHAI CHAIN PRODUCTION WORKSHOP\",\"title\":\"Build repeat orders around confirmed details.\",\"copy\":\"The production route is reviewed around the chain or part type, wire diameter, dimensions, material, quantity, and finish. 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