304/316 Stainless Steel Flat Washers - Large Fender Washers from China Suppliers & Factory, DIN 9021 Standard
Manufacturing Process
Multi Station Cold Heading Technology
Intelligent Heat Treatment System
Micron-Level Thread Rolling Process
Fully Automatic Optical Sorting
Environmentally Friendly Surface Treatment Line
Metallographic And Mechanical Joint Laboratory
Quality Control System
Raw Material Source Locking
Furnace Number Batch Full Traceability
Third Party Material Certification
Process Parameters Open And Transparent
Salt Spray Test Real Time Monitoring
International Standard Compliance Declaration
Flexible Customization
Customizable head/slot Shapes
Extreme Application Of Special Materials
Breakthroughs In Extra Large/Long Specifications
Integrated Assembly Of Components
Customizable Surface Treatment Colors
Personalized Packaging And Labeling
Technical Service
On-Site Failure Analysis
Selection Calculation And BOM Optimization
Installation Tool Selection Guidance
Inventory Management (VMI) Trusteeship
Free Sample Making And Testing
International Standard Translation And Interpretation
🚀 Multi-Material & Full-Size Options for Durability in All Conditions
Our flat washers (including extra-large fender washers) are available in 304/316 stainless steel (A2/A4) and Q235 carbon steel (grades 4.8/8.8). Polished and passivated stainless steel offers natural corrosion resistance for outdoor and marine environments, while galvanized carbon steel provides cost-effective rust protection. With inner diameters from M2 to M64 and customizable outer diameters and thicknesses, they meet diverse fastening needs for construction, automotive, and mechanical equipment applications.
📏 Oversized Outer Diameter for Enhanced Pressure Distribution
Manufactured to DIN 9021 and GB/T 97.1 standards, the oversized outer diameter significantly increases contact area compared to standard washers, effectively distributing clamping pressure to prevent damage or pull-through of soft materials, thin sheets, or slotted holes. Precision inner holes ensure a perfect fit with bolts, while smooth, burr-free surfaces provide uniform load distribution for reliable performance.
🛠️ Tool-Free Installation & Versatility for Bulk Assembly
These washers install easily by placing them under the nut or bolt head without special tools, simplifying assembly and improving efficiency. Stainless steel versions perform well in humid, salt spray environments, while carbon steel options offer excellent wear and corrosion resistance. Widely used in construction, automotive, mechanical equipment, and general assembly.
Application Scenarios
High-Quality Flat Washer Display
Frequently Asked Questions
What materials are available for your flat washers?
We offer flat washers in 304 and 316 stainless steel (A2/A4) for superior corrosion resistance, as well as Q235 carbon steel (Grades 4.8/8.8) with galvanized finishes for cost-effective strength.
Do you support custom sizes for oversized fender washers?
Yes, we provide extensive customization capabilities. Beyond standard DIN 9021 and GB/T 97.1 sizes, we can customize outer diameters, thicknesses, and inner diameters to fit your specific application requirements.
How do you ensure the quality of your washers?
Our quality control system includes raw material source locking, furnace number batch traceability, and full process monitoring. We also perform salt spray testing and optical sorting to ensure every piece meets international standards.
What is the advantage of using oversized flat washers?
Oversized washers (fender washers) distribute the clamping load over a larger surface area. This is ideal for fastening soft materials like wood or thin sheet metal, preventing the bolt head or nut from pulling through the material.
Can I request samples for testing before bulk purchase?
Absolutely. We offer free sample making and testing services to ensure our fasteners meet your technical specifications and performance needs before you commit to a large order.