This washer is made from A2 stainless steel and is designed with a large 30mm outer diameter to suit M10 fixings. Often called a penny or mudguard washer, it provides an expanded bearing surface compared to standard washers, helping to support loads on timber, sheet materials, or composites where material thickness or strength may be limited.
On site, this type of washer is typically used in joinery, fencing, and construction when securing bolts or threaded rod. It is useful for preventing pull-through on thinner panels and for evening out pressure around oversized or irregular holes. Its corrosion-resistant finish makes it suitable for outdoor and damp environments in addition to general indoor applications.
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