Stainless Steel Fender Washer
Stainless steel fender washer is a large outside diameter fastening washer designed to distribute load over a wider surface area and protect connected materials from damage. The stainless steel fender washer is manufactured from corrosion-resistant stainless steel, providing excellent durability, surface protection, and long-term performance in demanding environments.
The stainless steel fender washer features a large outer diameter with a relatively small inner hole, making it ideal for fastening applications involving thin materials, soft surfaces, or components requiring increased load distribution. It is widely used in automotive, marine, construction, electronics, machinery, and industrial assembly applications.

Product Overview
The stainless steel fender washer is engineered to provide enhanced bearing support compared with standard flat washers. Its wide outer diameter helps spread clamping force across a larger area, reducing stress concentration and preventing damage to the mounting surface.
Manufactured from stainless steel materials such as 304 and 316, the stainless steel fender washer offers excellent resistance to moisture, oxidation, and corrosion. It is suitable for applications where both mechanical reliability and clean appearance are required.
As a commonly used industrial fastener accessory, it is widely selected by OEM manufacturers, distributors, machinery builders, and engineering contractors.
Product Specifications
| Item | Description |
|---|---|
| Product Name | Stainless Steel Fender Washer |
| Material | Stainless Steel |
| Washer Type | Fender Washer / Large Diameter Washer |
| Material Options | 304 / 316 Stainless Steel |
| Shape | Round Flat Washer with Large Outer Diameter |
| Size Range | M2–M20 / Customized |
| Inner Diameter | According to Requirement |
| Outer Diameter | Large Diameter Design |
| Thickness | According to Requirement |
| Surface Finish | Natural Stainless Steel / Polished |
| Installation Type | Bolt and Screw Assembly |
| Packaging | Bulk / Carton / OEM Packaging |
| Customization | Size, material, finish available |
Technical Parameters
| Parameter | Value |
|---|---|
| Material Grade | 304 / 316 Stainless Steel |
| Tensile Strength | According to stainless steel grade |
| Yield Strength | According to material condition |
| Hardness | Controlled according to requirement |
| Density | Approx. 7.9 g/cm³ |
| Corrosion Resistance | Excellent |
| Load Distribution | High due to large bearing area |
| Manufacturing Standard | DIN / ANSI / Customized |
Materials and Manufacturing Process
The stainless steel fender washer is manufactured through precision stamping and finishing processes to ensure accurate dimensions, smooth edges, and reliable performance.
- Raw material selection: High-quality stainless steel sheet or strip
- Stamping process: Precision punching of washer shape
- Hole processing: Accurate inner diameter production
- Edge finishing: Removes burrs and sharp edges
- Surface treatment: Cleaning, polishing, and passivation when required
- Inspection: Dimension accuracy, thickness, and surface quality testing
- Packaging: Protective industrial packaging for transportation
Each stainless steel fender washer is produced under strict quality control to ensure consistent performance.
Applications of the Product
The stainless steel fender washer is widely used in industries requiring larger load distribution:
- Marine industry: Boat equipment and corrosion-resistant assemblies
- Automotive industry: Vehicle body and component fastening
- Construction industry: Thin sheet and structural connections
- Electrical equipment: Panel and enclosure installation
- Electronics industry: Protecting delicate mounting surfaces
- Machinery manufacturing: Equipment assembly applications
- Outdoor equipment: Weather-resistant fastening systems
- Industrial production: General fastening solutions
Its large bearing surface makes it suitable for fastening applications involving soft materials such as plastic, fiberglass, and thin metal sheets.
Why Choose This Product
- Premium stainless steel material
- Excellent corrosion resistance
- Large outer diameter improves load distribution
- Protects surfaces from bolt pressure damage
- Suitable for marine and outdoor environments
- Smooth appearance and clean finish
- Available in 304 and 316 grades
- Multiple size options available
- OEM customization support
The stainless steel fender washer provides a reliable solution for applications requiring wider support and corrosion resistance.
Why Choose Flybear
Flybear is a professional manufacturer specializing in industrial fasteners and customized fastening solutions.
- Advanced stamping and washer manufacturing capability
- Experience with stainless steel components
- Support for customized dimensions and materials
- OEM/ODM production capability
- Stable manufacturing capacity for bulk supply
- Strict quality inspection procedures
- Global export experience
- Engineering support for special requirements
Flybear provides reliable fastening products for marine, automotive, machinery, and industrial customers worldwide.
Quality Inspection and Control
Quality assurance is maintained throughout production:
- Stainless steel chemical composition analysis
- Raw material certificate verification
- Inner and outer diameter inspection
- Thickness measurement
- Flatness inspection
- Surface finish inspection
- Corrosion resistance evaluation
- Packaging quality inspection
All manufacturing processes follow ISO-based quality management systems to ensure consistent product reliability.
Selection Guide
When selecting a stainless steel fender washer, consider:
- Bolt or screw size compatibility
- Required bearing surface area
- Material thickness of the assembly
- Corrosion environment
- Load distribution requirements
- Stainless steel grade selection
Choosing the correct washer size helps improve fastening stability and protects connected components.
FAQ
1. What is a stainless steel fender washer used for?
It is used to distribute fastening loads over a larger area and protect thin or soft materials.
2. Why choose stainless steel fender washers?
Stainless steel provides excellent corrosion resistance and long service life.
3. What is the difference between a fender washer and a standard flat washer?
A fender washer has a much larger outer diameter compared with a standard flat washer.
4. Can custom sizes be produced?
Yes, Flybear supports customized dimensions, materials, finishes, and packaging.
5. Are stainless steel fender washers suitable for outdoor applications?
Yes, especially 304 and 316 stainless steel versions are suitable for many outdoor environments.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
Contact us for quotation, customization, and technical support via Contact Us.




