Explore our premium grade fasteners manufactured using German & Taiwanese precision technology
Sinsun Hardware, established in 2006, is a leading manufacturer and global supplier of high-quality fasteners. As Northern China's largest producer of Self-Tapping Screws, we operate from a gigantic 30,000 sqm integrated facility that includes modern production zones, a 12,000 sqm smart warehouse (18,000+ pallet capacity), and multi-language customer support centres. Our yearly supply of over 8,500 containers consistently services key global markets such as the Middle East, Southeast Asia, South America, and Russia.
Our production prowess is driven by German-imported machinery, precision Taiwanese technology, and a dependable staff of trained specialists. We offer over 20,000 SKUs of nails, screws, wires, and rivets, each undergoing 12+ stringent quality checks to assure outstanding polish (Ra ≤ 0.4μm), corrosion resistance (1,000+ hours salt spray), dimensional accuracy (±0.02mm), high strength (1,000+ MPa), and consistent hardness (HRC 28-32).
We specialise in offering unique fastening solutions that are tailored to your specific needs. Our technical team works directly with clients from design to manufacturing, providing support for unusual materials, coatings, dimensions, and performance requirements to ensure that each custom order matches exact specifications.
From design to manufacturing, tailored solutions matching your exact blueprints.
Integrating raw material spheroidizing, drawing, and high-performance cold heading.
18,000+ pallet capacity ensuring swift and dependable global lead times.
Industrial components are undergoing a significant evolution driven by aesthetic demands, safety mandates, and extreme environment endurance.
Chrome cap nuts (acorn nuts) are vital for shielding threads against chemical exposure, moisture, and road debris. As automotive and architectural designs advance, there is a mounting shift toward multi-layer electroplating processes—specifically, combining copper base coats, nickel barriers, and trivalent chrome topcoats to exceed 1,000 hours of neutral salt spray testing.
In the EV segment, exposed fasteners require excellent electrical insulation properties and aesthetic matching with body trims. In modern architecture, designers use chrome cap nuts to cover thread ends on glass curtain walls and structural frameworks, merging mechanical utility with high-end industrial aesthetics.
Advanced supply chains require strict consistency. Utilizing computerized optical sorting machines ensures that threads, plating thickness, dome alignment, and mechanical properties achieve zero ppm defects. Sinsun Hardware addresses this demand via modern sorting arrays, guaranteeing flawless assembly line feed rates.
Procuring wholesale fasteners internationally poses high-stakes challenges. Sinsun Hardware mitigates these through end-to-end integration and rigorous quality control.
Tolerances within ±0.02mm and smooth thread profiles ensure quick manual or automated installation without cross-threading.
Our advanced electroplating guarantees high adhesion of the chrome layer, preventing chipping or flaking even under severe high-torque applications.
Backed by a 12,000 sqm warehouse and 8,500 container capacity, we keep ready-to-ship stock to shield businesses from shipping volatility.
Our chrome cap nuts (acorn nuts) are engineered to meet global industrial standards (DIN 1587, ASME/ANSI B18.2.2). Below are the baseline parameters of our manufacturing output:
| Parameter | Sinsun Specification Standard |
|---|---|
| Size Range | M3 to M24 / #6 to 1" (Custom sizes available) |
| Materials | Carbon Steel (Class 6, 8, 10), Brass, Stainless Steel (SS304/SS316) |
| Plating Thickness | Copper Undercoat (3-5μm) + Nickel (5-8μm) + Chrome (0.3-0.5μm) |
| Salt Spray Test | ASTM B117 standards, 96 hours to 1000+ hours based on client request |
| Dimensional Tolerance | ±0.02 mm (Precision Taiwanese machining) |
| Surface Roughness | Ra ≤ 0.4 μm (Mirror-finish grade) |
From a specialized startup to a global fastener supply chain leader. Explore our timeline of growth, technology integration, and expansion.
Sinsun launched with a primary focus: building a world-class manufacturing facility for high-performance self-tapping screws and core cold-heading components, laying our foundational expertise.
Establishment of our dedicated Export Department. Sinsun's specialty fasteners began expanding into the Middle East, South America, Russia, and Southeast Asia.
Added four advanced spheroidizing annealing furnaces and in-house wire drawing lines. Sinsun began processing raw steel internally to control chemical composition and microstructure.
Upgraded our lines with German multi-station cold heading machinery. Expanded into custom drill tail screws and high-precision cap nuts using Taiwanese engineering standards.
Reached a milestone of 36,000 tons annual production and successfully dispatched over 1,100 global containers, securing Sinsun’s role as an industry leader.
Constructed our 12,000 sqm smart warehouse (featuring an 18,000+ pallet capacity) and dedicated 1,200 sqm ready-stock zone for rapid international shipments.
Installed four state-of-the-art gas-fired heat treatment lines. This in-house capacity guarantees consistent grain refinement, target hardness (HRC 28-32), and on-schedule deliveries.
Combining raw material authority with imported machinery to achieve superior mechanical properties.
We source premium steel from XING TAI Steel, processing it through in-house spheroidizing annealing and drawing. This control over raw rod processing prevents microscopic voids, ensuring high ductility before cold heading.
Multi-station cold headers from Germany deliver consistent plastic deformation. Coupled with Taiwanese tooling, our lines manufacture intricate caps and domes without split seams or dimensional variance.
Our four heat treatment lines run on automated carbon-potential atmospheric control, giving every batch uniform hardness (HRC 28-32) and preventing post-plating hydrogen embrittlement.
Sinsun Hardware supplies specialized cap nut configurations engineered to meet the unique challenges of global industries.
Designed for wheel assemblies, engine manifolds, and chassis trim. Excellent resistance to high vibrations, thermal cycles, and winter road salt sprays.
Covers exposed studs on food processing gear, agricultural tools, and chemical pumps, protecting operators from sharp threads while preventing thread contamination.
Ideal for frameless glass wall fixtures, banisters, and high-visibility facade elements, providing a polished look along with durable load capacity.
Featuring multi-layer barriers for harsh environments, our marine-grade cap nuts prevent seawater intrusion and galvanic corrosion on aluminum structural joints.
As standard fasteners transform into high-tech engineering components, Sinsun Hardware is executing a forward-looking technological roadmap:
Committed to environmentally friendly surfacing technology, helping our clients navigate shifting international environmental standards.
Expert answers addressing the technical, logistical, and material queries of procurement officers and engineers.
Electroplated chrome offers greater hardness and wear resistance than zinc. The multi-layer plating system (copper undercoat, nickel barrier, and chrome top layer) provides exceptional corrosion defense. It withstands more severe salt spray exposure and yields a mirror-like finish (Ra ≤ 0.4μm), making it ideal for both harsh outdoor applications and high-end visual designs.
We manufacture chrome cap nuts in compliance with major global standards, including DIN 1587 (full acorn cap design), DIN 917 (low-crown design), and ASME/ANSI B18.2.2 (Imperial standards). Every shipment is accompanied by MTRs (Material Test Reports) certifying dimensional compliance and metallurgical grades.
During electroplating, hydrogen gas can seep into the steel grain structure, causing potential brittle failures under stress. Sinsun implements an in-house post-plating baking process. Our automated baking ovens maintain temperature control for a minimum of 4 hours to drive out trapped hydrogen, ensuring the cap nuts retain their tensile strength (1,000+ MPa).
We offer wide-ranging custom solutions. This includes specific dome heights, thread pitches (metric fine, UNC, UNF), alternative metals (brass, stainless steel, alloy steel), and customized plating thickness. Additionally, we provide custom 3D packaging designs, retail-ready labelling, and tailored batch boxing through our 12,000 sqm logistics center.
We run a modern warehouse layout holding stock for common product lines. Producing 36,000 tons annually and managing logistics for over 8,500 containers allows us to coordinate closely with international shipping lines. This vertical control ensures predictable dispatch schedules and shields clients from supply chain disruptions.
High-quality industrial fasteners engineered for modern engineering requirements
