Our flat washers are available in metric (form A, B, C & G) and imperial. Metric Form A and C are the same thickness but Form C has a larger diameter. Metric Form B washers have the same diameter as Form A but they are thinner.

Imperial sized flat washers are classified in tables – a more detailed explanation is available on the imperial washers page.

If you need a washer with a larger diameter than our standard flat washer choose a repair washer.