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 Europe.
By leveraging precision Taiwanese engineering and German-imported machinery, Sinsun Hardware has built a comprehensive production structure. Our stainless steel fender washers represent the pinnacle of our component catalog, engineered to deliver unmatched surface flatness, corrosion mitigation, and load-distribution parameters for high-stress applications across the marine, solar, automotive, and construction sectors.
Fender washers are characterized by a disproportionately large outer diameter (OD) relative to their inner diameter (ID). This unique spatial ratio is designed to distribute the clamping force of a threaded fastener over a significantly broader surface area than standard flat washers (such as DIN 125 or ISO 7089).
When fastening thin metal sheets, soft plastics, wood, or composite panels, standard washers risk causing localized stress cracking, deformation, or structural pull-through under torque load. Our Stainless Steel Fender Washers act as mechanical load spreaders. By increasing the surface area contact, they reduce the pressure density ($P = F/A$), stabilizing the joint against shear, vibrational loosening, and structural fatigue.
Selecting the correct chemical composition is essential for operational longevity. We manufacture fender washers utilizing premium-grade stainless alloys:
| Alloy Grade | Chemical Indicators (Cr, Ni, Mo) | Yield Strength (Rp0.2) | Optimal Operational Environment |
|---|---|---|---|
| SS304 (A2-70) | 18% Cr, 8% Ni | ≥ 450 MPa | General outdoor setups, standard industrial machinery, architecture. |
| SS316 (A4-80) | 16% Cr, 10% Ni, 2% Mo | ≥ 600 MPa | Marine environments, chemical treatment plants, coastal solar grids. |
| Carbon Steel (HDG) | Fe, Carbon content traces | ≥ 250 MPa | Low-cost dry environment assemblies; prone to corrosion if coating fails. |
Our SS316 class utilizes molybdenum to inhibit chloride pitting, ensuring long-term utility in harsh ocean spray or high-pollution conditions. All alloys undergo rigorous chemical testing using spectrometer technologies to certify compliance with international chemical parameters.
Our production processes utilize precision stamping machinery, ensuring consistent dimensions across our vast inventory.
At SINSUN, quality control starts at the source. We utilize premium raw material blocks, processing them with advanced Taiwanese and German machinery.
We start with premium steel stock from XING TAI Steel. We process this using in-house spheroidizing annealing and wire drawing to ensure structural consistency prior to stamping.
By integrating multi-station cold heading systems and Taiwanese manufacturing processes, our automated tooling ensures exact mechanical tolerances on every washer produced.
Our facility features four specialized heat treatment lines, allowing us to manage tempering parameters for optimal mechanical hardness (HRC 28-32) and tensile strength.
Since our founding in 2006, SINSUN has grown into a leading Chinese fastener manufacturer. Explore our key developmental milestones.
Established with a focus on self-tapping screws, building our expertise in specialized production processes from the ground up.
Founded our export division to serve international construction and manufacturing markets directly.
Added spheroidizing furnaces and wire-drawing capabilities, allowing us to control quality starting from raw material processing.
Integrated German multi-station cold heading systems to increase production efficiency and expand our manufacturing capacity.
Reached 36,000 tons of annual production output and processed over 1,100 export containers.
Established a dedicated 12,000m² smart warehouse to support local and global supply chains.
Commissioned four new heat treatment lines to increase output capacity and ensure reliable lead times.
Stainless steel fender washers are widely used in critical industrial environments where mechanical reliability is essential.
SS316 fender washers are highly resistant to chloride corrosion, making them suitable for marine hulls, docks, and coastal architectural installations.
Used to secure solar racking to roofing structures, distributing wind load and thermal stress across thin metal sheets without risking structural failure.
Ideal for securing body panels, engine shields, and mudguards, providing vibration dampening and preventing bolt pull-through.
To support global supply chains, our production processes comply with major international quality and environmental directives:
Through our professional packaging team and 12,000m² warehouse facility, we offer customization options to suit your distribution channels:
We welcome regular site visits from international clients, demonstrating our production transparency and manufacturing capacity. We actively participate in industry exhibitions to share technology developments and connect with global partners.
Connect with our technical sales team for dimension specifications, material analysis certificates, and pricing structures.
