M4 Penny Washer (Standard) 4.3mm ID x 20mm OD A4 Stainless Steel
| Quantity |
Unit Price
(ex. VAT)
|
Unit Price
(inc. VAT)
|
|---|---|---|
| 1 - 99 | £0.14 | £0.17 |
| 100 - 499 | £0.10 | £0.12 |
| 500 - 999 | £0.08 | £0.10 |
| 1000 - 9999 | £0.07 | £0.09 |
| 10000 + | £0.06 | £0.07 |
£0.17 / each
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Product Specification
| Size | M4 |
| Internal Diameter | 4.3mm |
| Outside Diameter | 20.0mm |
| Thickness | 1.50mm |
| Material | A4 Stainless Steel |
Frequently Bought Together
M4 x 25mm Slotted Cheese Head Machine Screw (DIN 84) | Marine Grade A4 Stainless Steel
Total Price: £0.00
M4 Penny Washer - 4.3mm ID x 20mm OD | A4 Stainless Steel
Where outdoor structures and exposed equipment require a larger washer footprint, this M4 Stainless Steel Penny Washer provides a 20.0mm outside diameter with a 4.3mm bore. The flat washer helps spread pressure, protect the surrounding surface and reduce the likelihood of pull-through.
What Are Stainless Steel Penny Washers?
Penny Washers provide additional bearing area around a threaded fastener. Their broad outer diameter is particularly useful on softer materials such as timber and plastic or on thin sheet where a smaller washer could concentrate pressure too closely around the fixing hole.
Common Applications
- General Engineering: Pairs with compatible bolts, machine screws and nuts across workshop and production assemblies.
- Thin Sheet Metal: Supports fasteners across a larger area around holes in thin fabricated sheet and panel materials.
- Furniture Assembly: Helps spread load around threaded fixings used in timber, metal and mixed-material furniture.
- Outdoor Structures: Supports exposed fixings on suitable fabricated frames, brackets and exterior equipment.
M4 x 20mm Stainless Steel Penny Washer Dimensions
- Size: M4
- Internal Diameter: 4.3mm
- Outside Diameter: 20.0mm
- Thickness: 1.50mm
- Material: A4 Stainless Steel
Key Benefits
- The wider range includes A2 and A4 Stainless Steel options across multiple metric sizes and outside diameters.
- 20.0mm outside diameter provides a larger bearing area than a standard flat washer.
- Wide washer footprint helps distribute clamping force across softer or thinner materials.
- Manufactured to BS 4320 as part of the Stainless Steel Penny Washer range.
See the wider Stainless Steel Penny Washers category for A2 and A4 options across M4 to M12. Technical support with washer sizing is available on 01233 713581.
Fri 8.30 am - 3.30 pm