Bright Zinc Plated Steel Plain Washer, 0.8mm Thickness, M4

Wetgeving en compliance

RS PRO Steel Plain Washer - Form A

From the trusted RS PRO Brand, these zinc plated steel 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.

Available in the following sizes:

560-316 is an M2 zinc plated steel washer 560-322 is an M2.5 zinc plated steel washer
560-338 is an M3 zinc plated steel washer
560-344 is an M3.5 zinc plated steel washer
525-925 is an M4 zinc plated steel washer
525-931 is an M5 zinc plated steel washer
525-947 is an M6 zinc plated steel washer
527-634 is an M8 zinc plated steel washer
527-640 is an M10 zinc plated steel washer
530-084 is an M12 zinc plated steel washer
276-926 is an M16 zinc plated steel washer
276-932 is an M20 zinc plated steel washer
193-3447 is a M24 Form A zinc plated steel washer
193-3448 is a M30 Form A zinc plated steel 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

• Steel with galvanised finish • Construction for durability
• Suitable for screw/bolt size M2 to M20
• Available in a range of metric 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 a Form A Washer?

Form A is a British Standard indicator for the metric outer diameter and thickness of a steel washer. It is a quick reference that in this case indicates a type of washer with a 'normal' diameter and thickness. Form A washers are suitable for most 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.



Kenmerk Waarde
For Screw/Bolt Size M4
Material Steel
Inside Diameter 4.3mm
Outside Diameter 9mm
Thickness 0.8mm
Finish Bright Zinc Plated
27 op voorraad - levertijd is 1 werkdag(en) (EU-voorraad)
2608 op voorraad - levertijd is 1 werkdag(en) (UK-voorraad)
Prijs 1 Bag of 250
(excl. BTW)
(incl. BTW)
Per zak
Per stuk*
1 - 4
€ 3,00
€ 0,012
5 - 9
€ 2,85
€ 0,011
10 - 29
€ 2,71
€ 0,011
30 +
€ 2,53
€ 0,01
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