M5 x 20mm Black Stainless Steel Penny Washers Blackened Washer (Pack of 10)

A2 304 STAINLESS STEEL CORE WITH BLACKENED FINISH – RUST RESISTANT & VISUALLY STRIKING Manufactured from A2 304 stainless steel for excellent corrosion resistance, then surface-treated to a deep matt black finish. Unlike painted or zinc-blackened mild steel washers that flake, scratch, and rust the moment the coating is broken, these washers retain their corrosion resistance even if the black finish wears at the contact point. Ideal for any project where appearance matters as much as performance — visible automotive bodywork, dark furniture, signage, garden installations, and architectural detailing. DIN 9021 FORM G WIDE-FORM – LARGE 20mm OUTER DIAMETER FOR LOAD SPREADING Manufactured to the DIN 9021 standard, these are large outer diameter "penny" washers (also known as Form G, wide-form, or fender washers). The oversized 20mm contact area spreads bolt clamping force across a wide surface — preventing the bolt head from pulling through soft materials like wood, plastic, plasterboard, sheet metal, fibreglass, or composite panels. Essential for any fixing into thin or fragile substrates where standard form A washers would cut through. PACK OF 10 — M5 BLACK PENNY WASHERS FOR MULTI-FIXING PROJECTS Each pack contains 10 individual M5 black penny washers with the precise 20mm outer diameter specified by DIN 9021 Form G. A practical quantity for car body and panel repair, caravan and motorhome maintenance, trailer board fixings, roof rack installations, sun sail and pergola anchors, fence post brackets, and any project requiring multiple wide-surface fixings in a discreet matt black finish. Also available in larger pack quantities — see our store for trade-volume options. VERSATILE – WOOD, METAL, GARDEN, AUTOMOTIVE & MARINE APPLICATIONS The combination of stainless steel corrosion resistance and decorative black finish makes these washers genuinely multi-purpose. Use them with M5 hex bolts, machine screws, threaded rod, or roofing bolts across exterior timber framing, garden trellis and pergola structures, vehicle bodywork and undercarriage, marine hatch and panel fixings, signage and architectural metalwork, and any DIY or trade project where a black washer outperforms standard zinc-plated alternatives both functionally and visually. UNIVERSAL M5 FIT – COMPATIBLE WITH ALL STANDARD M5 BOLTS, SCREWS & RIVETS With a precise M5 inner bore, these penny washers are universally compatible with all standard M5 metric bolts, machine screws, coach bolts, threaded rod, and rivets across all major brands and standards. Pairs perfectly with A2 304 stainless hex bolts, hex flange bolts, button head socket screws, and dome nuts. Available in a full range of sizes from M3 through M10 in 10-pack and 20-pack quantities — browse our complete black penny washer range to find the exact size and quantity for your project.