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Stainless Steel Form B Washers (BS 4320B / DIN 125-B)
A2 stainless steel Form B washers for corrosion-resistant clamping and wider load distribution in external applications.
Timco A2 Stainless Steel Form B Washers – M10 – Bag of 10
In stock
£0.58 ex VAT(£0.69 inc VAT)
SKU:
WB10SSX
Timco Form B Washers – A2 Stainless Steel – M12 – Bag of 10
In stock
£0.66 ex VAT(£0.79 inc VAT)
SKU:
WB12SSX
Timco Form B Washers – A2 Stainless Steel – M16 – Bag of 10
In stock
£1.08 ex VAT(£1.29 inc VAT)
SKU:
WB16SSX
Timco Form B Washers – A2 Stainless Steel – M6 – Bag of 20
In stock
£0.49 ex VAT(£0.59 inc VAT)
SKU:
WB6SSX
Timco Form B Washers – A2 Stainless Steel – M8 – Bag of 20
In stock
£0.58 ex VAT(£0.69 inc VAT)
SKU:
WB8SSX
What are stainless steel Form B washers used for?
Stainless steel Form B washers are used to spread load under a bolt or nut while providing strong corrosion resistance. Because they have a larger outer diameter than Form A washers, they distribute pressure across a wider surface area.
Manufactured from A2 stainless steel, these washers conform to BS 4320B, which is equivalent to DIN 125-B. They are thinner than Form A washers and are suitable for clamping and spacing applications in external, damp or corrosive environments.
Specifications
| Material | A2 Stainless Steel |
| Standard | BS 4320B / DIN 125-B |
| Corrosion Rating (1–5) | 4 – Urban & industrial areas with moderate salt atmosphere |
| Profile | Form B – Wider outer diameter |
Available Sizes
| Washer Size | To Suit Bolt | Typical Uses |
|---|---|---|
| M6 | M6 bolt | External furniture and light timber joints |
| M8 | M8 bolt | Decking, fencing and outdoor structures |
| M10 | M10 bolt | Gate hardware and structural timber connections |
| M12 | M12 bolt | Heavy external fixings and frames |
Why choose Form B instead of Form A?
Form B washers have a larger outer diameter than Form A washers. As a result, they provide greater load distribution and improved surface coverage.
They are commonly selected when fixing into softer materials, oversized holes or where increased load spreading is required.
