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M20 (21mm) x 37mm Form A Washer (Flat) DIN 125A | Galvanised Steel
| Quantity |
Unit Price
(ex. VAT)
|
Unit Price
(inc. VAT)
|
|---|---|---|
| 2 - 99 | £0.17 | £0.20 |
| 100 - 249 | £0.15 | £0.18 |
| 250 - 499 | £0.12 | £0.14 |
| 500 + | £0.07 | £0.09 |
Product Stock
| Product Specifications | WA125-M20-HDG |
|---|---|
| Size | M20 |
| Internal Diameter | 21.0mm |
| Outside Diameter | 37.0mm |
| Thickness | 3.0mm |
| Material | Steel Galvanised |
| Standard | DIN 125A |
Same Day Dispatch Available
Order by 4pm (UK) for same day dispatch (Monday – Thursday, 2pm Friday). Next Day or Standard Delivery available via DHL or Royal Mail.
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Product Description
M20 Form A Flat Washer, 37.0mm OD, 21.0mm ID, 3.0mm Thickness, DIN 125A, Galvanised Steel | Vital Parts – WA125-M20-HDG
Improve load distribution and protect joint surfaces using our Form A Flat Washer, a general-purpose washer designed to sit under bolt heads and nuts to reduce surface damage and help maintain reliable clamp load. Manufactured to DIN 125A from Galvanised Steel, this washer suits M20 fixings and provides a stable bearing surface with a 37.0mm outside diameter, a 21.0mm internal diameter and a 3.0mm thickness for consistent assembly.
What Are Form A Flat Washers?
Form A flat washers are plain washers with a standard outside diameter, commonly used to spread the load of a fastener over a wider area. By increasing the contact surface between the fastener and the material, they help reduce the risk of pull-through, marking and localised deformation, particularly on softer substrates. The galvanised finish provides practical corrosion resistance for general indoor use and sheltered external environments.
Applications and Key Industries
These M20 Form A flat washers are widely used across the UK wherever dependable spacing and load spreading is required. Typical uses include:
- Construction and Building Services: Under nuts and bolt heads on brackets, frames and fixings to protect surfaces and improve joint stability.
- Plant and Maintenance: General repairs and replacement work where a consistent bearing surface helps reduce loosening and wear.
- Fabrication and Engineering: Assembly of fixtures, guards and panels where a washer helps prevent damage to painted or plated finishes.
Procurement teams, maintenance engineers and installers often specify washers by internal diameter, outside diameter and thickness to ensure compatibility with the fastener and the joint design.
Why Choose These Form A Flat Washers?
Made to DIN 125A, this washer offers dependable geometry for repeatable builds. The 21.0mm internal diameter supports a close fit on M20 fasteners, while the 37.0mm outside diameter increases the load-bearing area. A 3.0mm thickness helps maintain spacing and reduces the likelihood of the fastener embedding into the surface under torque.
Key Features
- Standard Form A profile: Suitable for everyday bolted joints requiring reliable load distribution.
- Corrosion resistant finish: Galvanised Steel construction supports longer service life in general-purpose environments.
- Consistent fit: Sized for M20 applications with a 21.0mm internal diameter for predictable assembly.
Product Specifications
- Size: M20
- Internal Diameter: 21.0mm
- Outside Diameter: 37.0mm
- Thickness: 3.0mm
- Material: Galvanised Steel
- Standard: DIN 125A
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