Plate Washers
Our plate washers are square washers laser cut from mild steel, pre-galvanised steel, and 304 2B and 316 2B stainless steel. Sizes run from 40 x 40mm to 150 x 150mm with clearance holes from M8 to M52. Mild steel is available from 0.9mm up to 10mm thick, with pre-galvanised and both stainless grades from 0.9mm to 5mm. Every plate washer is manufactured to order, cut to the size, hole and thickness your job requires.
The square shape gives a plate washer a larger bearing surface than a round washer with the same hole size, spreading load across a wider area around the bolt or fastening. Choose 304 stainless for general interior and exterior use, or 316 where higher corrosion resistance is needed, such as marine and coastal environments.If you need a standard round washer, see our round metal washers in 316 stainless steel and pre-galvanised steel.
To save you time, simply select the material you want your plate washer made from, choose the thickness and size, and the price will automatically update so you can add the item straight to your basket.
Need something bespoke? Our team is ready to help!
Enjoy store wide discounts, up to 55% off on bulk orders.
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Stainless Steel Plate Washers
Price range: £0.80 through £22.16 ex VAT This product has multiple variants. The options may be chosen on the product page -
Pre-Galvanised Steel Plate Washers
Price range: £0.80 through £7.68 ex VAT This product has multiple variants. The options may be chosen on the product page -
Mild Steel Plate Washers
Price range: £0.80 through £7.52 ex VAT This product has multiple variants. The options may be chosen on the product page
We manufacture and supply metal plate washers in S275JRPO mild steel, CR4 steel, 304 2B and 316 2B stainless steel, and pre-galvanised steel. Stainless steel 316, stainless steel 304, and pre-galvanised steel plate washers are available from 0.9mm to 5mm thick. Mild steel plate washers are available from 0.9mm to 10mm thick.
| Material | Grade | Thickness | Sizes | Bolt sizes |
|---|---|---|---|---|
| Mild steel | CR4, S275JRPO | 0.9, 1.2, 1.5, 2, 2.5, 3, 4, 5, 6, 8 and 10mm | 40 x 40mm to 150 x 150mm | M8 to M52 |
| Pre-galvanised steel | Pre-galvanised | 0.9, 1.2, 1.5, 2, 2.5, 3, 4 and 5mm | 40 x 40mm to 150 x 150mm | M8 to M52 |
| Stainless steel | 304 2B, 316 2B | 0.9, 1.2, 1.5, 2, 2.5, 3, 4 and 5mm | 40 x 40mm to 150 x 150mm | M8 to M52 |
Sizes: 40 x 40mm, 50 x 50mm, 75 x 75mm, 100 x 100mm and 150 x 150mm. Bolt sizes: M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M33, M36, M39, M42, M45, M48 and M52.
Plate Washers FAQs
What is the difference between a plate washer and a round washer?
A plate washer is a square washer. The square shape gives it a larger bearing surface than a round washer with the same hole size, spreading load across a wider area around the bolt or fastening.
What sizes do your square washers come in?
Our square plate washers come in 40 x 40mm, 50 x 50mm, 75 x 75mm, 100 x 100mm and 150 x 150mm, with clearance holes for bolt sizes from M8 to M52.
How thick are your plate washers?
Mild steel plate washers come in 0.9mm to 10mm thick. Pre-galvanised steel and 304 and 316 stainless steel plate washers come in 0.9mm to 5mm thick.
Which material should I choose for square washers?
Mild steel suits dry, indoor and structural work, and goes up to 10mm thick. Pre-galvanised steel has a zinc coating for added corrosion protection. Choose 304 stainless for general interior and exterior use, or 316 where higher corrosion resistance is needed, such as marine and coastal environments.
Can you make custom plate washers?
Yes. Every plate washer is laser cut to order, so you choose the material, thickness, size and hole. Our average lead time is 3 to 4 working days. For a shape or size outside the standard options, use our Part Builder for an instant price.
Do you offer bulk discounts on plate washers?
Yes. Discounts apply automatically from 10 plate washers: 18% off 10 to 49, 30% off 50 to 149, 35% off 150 to 499, 50% off 500 to 1,499 and 55% off 1,500 or more. Orders over £100 ex VAT also get free delivery.