Forgefix Repair Washers - M8 X 40mm
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Product Information
Full details
The Forgefix Repair Washers (M8 X 40mm) are essential hardware components designed for DIY enthusiasts, professional contractors, and woodworkers who require reliable load distribution for M8 fasteners. These washers are engineered to create a smooth, stable surface for nuts and bolts, effectively preventing hardware from sinking into soft materials or loosening over time. While they offer excellent corrosion resistance for general applications, they are best suited for indoor or light-duty outdoor environments rather than extreme marine conditions.
All features
| Model Part Number | M8 X 40mm |
|---|---|
| Brand | Forgefix |
Extended Product Information
FAQs
Can I use these washers for M6 bolts?
No, these are specifically sized for M8 bolts. Using them with smaller bolts will result in a loose fit that lacks stability.
Are these stainless steel?
No, they are made of steel with a bright Zinc Plated finish. They offer good corrosion resistance but are not equivalent to marine-grade stainless steel.
What is the primary purpose of a 'repair' washer?
A repair washer has a larger outside diameter than a standard washer, making it ideal for covering oversized or damaged bolt holes.
Can I paint these washers?
Yes, but you should lightly scuff the zinc surface with fine sandpaper and use a metal-compatible primer first for better adhesion.
Are these washers heat-treated?
These are standard carbon steel repair washers and are not specifically heat-treated for high-tensile structural applications.
Troubleshooting
Washer does not sit flush against the surface
Ensure there are no burrs on the fastener hole and that the material surface is flat.
Fastener feels loose despite tightening
Verify that the material being fastened is not compressing or deforming under the load; if it is, consider adding a secondary support plate.
Pros and Cons
Pros
- Wide 40mm diameter provides excellent load spreading
- Bright Zinc Plated finish prevents premature rust
- Prevents surface damage on wood or plastic materials
- Compatible with all standard M8 metric hardware
Cons
- Not suitable for high-saline or marine environments
- May require larger fastener clearance due to wide outer diameter
- Limited to M8 sized bolts
Setup, Compatibility & Care
To install, simply slide the M8 repair washer onto the shank of your M8 bolt before inserting the bolt through your assembly. Ensure the surface is as level as possible to maximize the contact area of the washer. While these washers are corrosion-resistant, they should not be exposed to harsh chemicals or constant submersion in water. If you notice any debris on the washers during assembly, wipe them with a clean, dry cloth to ensure a flush fit. When working in humid environments, consider using a light coat of machine oil or silicone spray to extend the life of the zinc plating.