Bright Zinc Plated Steel Plain Washer, 1mm Thickness, M5

  • RS Stock No. 525-931
  • Manufacturer RS PRO
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
Product Details

RS Pro Steel Plain Washer - Form A

RS Pro steel plain 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.

How do they work?

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

Application Information

RS Pro washers are an essential part of any fastener assembly. Use them to make maintenance easier by allowing for smoother loosening and tightening of components. Ideal for use 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.


Washers are used to distribute the force of the screw head of a screw or nut on a larger surface.



Attribute Value
For Screw/Bolt Size M5
Material Steel
Inside Diameter 5.3mm
Outside Diameter 10mm
Thickness 1mm
Finish Bright Zinc Plated
81 Within 1 working day(s) when ordered before 3.30 pm.
1414 Within 4 working day(s) (Global stock)
Price 1 Bag of 250
SGD 4.19
(exc. GST)
SGD 4.48
(inc. GST)
Per Bag
Per unit*
1 - 4
5 - 9
10 - 29
30 +
*price indicative