Heavy-Duty M3-M20 Fender Washers: Superior Support for Thin Substrates
Our M3-M20 Fender Washers, also known as Repair Washers or Mudguard Washers, are specifically engineered for applications where standard washers simply don’t provide enough surface area. Featuring an exceptionally large outer diameter relative to the hole size, these large OD washers distribute clamping force over a much wider area. This makes them indispensable when fastening to thin sheet metal, brittle plastics, or softwoods, as they effectively prevent the fastener from “pulling through” the material under stress.
As a leading fender washer factory, we provide high-precision stamped washers in 304/316 Stainless Steel for long-term rust protection and Zinc-Plated Carbon Steel for cost-effective industrial use.
- Maximum Load Distribution: Spreads the pressure of a nut or bolt over a large surface area, protecting the workpiece from crushing or deforming.
- Versatile Repair Tool: Perfect for covering oversized or damaged holes in automotive body panels or electrical boxes.
- Corrosion Resistance: Our SS316 Fender Washers are the preferred choice for marine rigging and outdoor signage where salt-air exposure is high.
- Precision Flatness: Every M6 and M8 fender washer is stamped with professional dies to ensure a perfectly flat profile and burr-free edges.
| Bolt Size | Inner Dia (mm) | Typical OD (mm) | Standard Thickness |
|---|---|---|---|
| M5 | 5.3 mm | 20 / 25 mm | 1.2 – 1.5 mm |
| M6 | 6.4 mm | 25 / 30 mm | 1.5 mm |
| M8 | 8.4 mm | 30 / 40 mm | 1.5 – 2.0 mm |
| M10 | 10.5 mm | 35 / 40 / 50 mm | 2.0 mm |
| M12 | 13.0 mm | 40 / 50 / 60 mm | 2.5 mm |
- Automotive Bodywork: Securing fenders, bumpers, and interior trim where metal is thin or holes are worn.
- Sheet Metal Fabrication: Providing a stable base for bolts in thin-walled enclosures and cabinets.
- Marine & Boating: Using SS316 fender washers for mounting hardware to fiberglass hulls and decks.
- Signage & Displays: Securing outdoor signs and banners to prevent wind-induced tearing.
A: A Fender Washer has a much larger outer diameter compared to a standard flat washer of the same bolt size, providing significantly more coverage.
Q: Do you offer M10 washers with a 50mm OD?
A: Yes, we specialize in extra-large OD washers and can customize the thickness and diameter to meet your specific project requirements.
Source M3-M20 Fender Washers from a Professional Manufacturer
Seeking bulk fender washers with custom dimensions and premium finishes? We support global wholesale and ISO-certified quality. Contact us today for a free quote and technical samples!
