Bright Zinc Plated Steel Mudguard Washer, M10 x 40mm, 1.5mm Thickness

Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): IN
Product Details

RS PRO Mild Steel Mudguard Washers

From the trusted RS PRO Brand, these zinc plated mild steel mudguard washers are generally used with a machine threaded fastener and nut to spread the load over a greater surface area when tightening a bolt, screw or nut. Their larger diameter means they are more suitable for use with worn thread holes than standard washers. As they are bright zinc plated they have an element of corrosion resistance and are suitable for use in many environments. They are supplied in bags of 100.

Available in the following sizes:

666-7753 is an M5x20 BZP Steel Mudguard Washer
666-7757 is an M5x25 BZP Steel Mudguard Washer
666-7766 is an M6x25 BZP Steel Mudguard Washer
666-7769 is an M6x30 BZP Steel Mudguard Washer
666-7763 is an M6x40 BZP Steel Mudguard Washer
666-7772 is an M8x25 BZP Steel Mudguard Washer
666-7775 is an M8x30 BZP Steel Mudguard Washer
666-7779 is an M8x40 BZP Steel Mudguard Washer
666-7788 is an M10x30 BZP Steel Mudguard Washer
666-7781 is an M10x40 BZP Steel Mudguard Washer
666-7785 is an M10x50 BZP Steel Mudguard Washer

How do they work?

RS PRO washers are an essential part of any fastener assembly, as they serve to incorporate spacing and distribute load when placed between a nut and bolts. These washers will help prevent wear and distortion of installation surfaces over time.

Features and Benefits

• Zinc plated mild steel • Construction for durability
• Available in a range of sizes


RS PRO washers are an essential part of any fastener assembly. They decrease the surface load when joining materials, meaning there is less pressure on the material, resulting in a decrease chance of wear and tear over time. You can use them to make maintenance easier by allowing for smoother loosening and tightening of components. Plain washers are commonly used in many electronic, food, chemical and construction applications.

What is the difference between a plain washer and a penny washer?
Other than standard washers, you might also hear washers referred to as fender washers, penny washers and mudguard washers. These 'repair washers' have a larger external diameter in comparison to the inner diameter, meaning a larger distribution of surface area. They can be used with a worn fixing hole or to fasten larger surface areas.


RS PRO aims to be your go-to brand for reliability and value for money. We source great parts at great prices and test everything with our in-house experts to ensure the quality you need. When it comes to tools and fasteners, we know that versatility and dependability are what you need. As such, we stock a variety of mainstay and specialist fasteners and couplers to suit any application. Whether you're a professional electrician, plumber, builder or DIY enthusiast, RS PRO is here to support you.

Attribute Value
For Screw/Bolt Size M10
Outside Diameter 40mm
Inside Diameter 10.5mm
Thickness 1.5mm
Material Steel
Finish Bright Zinc Plated
78 In stock - FREE next working day delivery available
Price 1 Bag of 100
£ 9.09
(exc. VAT)
£ 10.91
(inc. VAT)
Per Bag
Per unit*
1 - 4
5 - 9
10 - 29
30 +
*price indicative
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