M20 Washers

We stock a comprehensive range of M20 washers to suit all fastening uses. Our selection includes flat washers, spring lock washers, extra-large penny washers, mudguard washers, and heavy-duty galvanised options. Each washer type is available in finishes to match our nuts and bolts range, including Bright Zinc Plate, Galvanised, 304 Stainless Steel, and 316 Stainless Steel.

Washer sizing is shown as inside diameter x outside diameter (for example, M4 x 9.0 flat washer = 4mm inside hole to suit M4 bolts x 9.0mm total outside diameter). All washers are available in multiple thicknesses to suit a wide variety of structural, engineering, and general assembly requirements.