Product Description
M8 A2 stainless steel flat penny repair washers, available with 25mm, 30mm, 35mm and 40mm external diameters.
These non-standard large-diameter flat washers provide a much wider bearing surface than conventional M8 flat washers. They help spread clamping loads across a larger area and are suitable for securing thin sheet materials, reinforcing mounting points and covering enlarged, worn or damaged holes.
- Nominal size: M8
- Internal diameter: Suitable for M8 metric fasteners
- Available external diameters: 25mm, 30mm, 35mm and 40mm
- Thickness: Approximately 1.5mm
- Material: A2 stainless steel
- Finish: Natural stainless steel
- Washer style: Flat penny repair washer
- Manufacturing standard: Non-standard / no DIN number stated
- Alternative names: Repair washer, penny washer, mudguard washer, fender washer and large-diameter flat washer
- Pack sizes available: 1, 5, 10, 20, 50, 100, 250, 500 and 1000
| Nominal Size | External Diameter | Thickness | Material | Standard |
|---|---|---|---|---|
| M8 | 25mm | 1.5mm | A2 Stainless Steel | Non-Standard |
| M8 | 30mm | 1.5mm | A2 Stainless Steel | Non-Standard |
| M8 | 35mm | 1.5mm | A2 Stainless Steel | Non-Standard |
| M8 | 40mm | 1.5mm | A2 Stainless Steel | Non-Standard |
M8 penny repair washers are commonly used for automotive bodywork, panels, brackets, electrical equipment, appliances, roofing, cladding, fabrication, machinery, trailers and general maintenance applications.
The enlarged outside diameter spreads the load from an M8 bolt, screw or nut over a wider area than a standard washer. This can help reduce localised pressure and lower the risk of a fastener pulling through thin or weakened material.
The 25mm external-diameter washer provides a compact enlarged bearing surface. The 30mm, 35mm and 40mm options provide progressively greater coverage where a wider load-spreading area or increased hole coverage is required.
A2 stainless steel provides good general corrosion resistance and is suitable for many indoor and outdoor applications. For marine, coastal, swimming-pool or highly corrosive environments, A4 stainless steel may be more suitable.
Use with a compatible M8 fastener where the washer hole and manufacturing tolerance provide suitable clearance. The washer should sit flat against the mating surface and be adequately supported across its bearing area.

| A | B | C |
| M8 | 25mm | 1.5mm |
| M8 | 30mm | 1.5mm |
| M8 | 35mm | 1.5mm |
| M8 | 40mm | 1.5mm |
Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.