These handy washers are made to protect the top of holes from galling or collapsing around studs or bolts. They’re ideal for head bolt holes, mid-motor plates, or any other high-wear area that requires a washer. Easy to install by just oversizing hole and pressing in washer. ARP Insert Washers are fully CNC machined from premium thru-hardened 8740 stock.

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ARP Washer, Hardened, High Performance, Flat, 6mm ID, 25.1mm OD, 1.7mm Thick, Chromoly, Black Oxide, Set of 10

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 16mm OD, 1.9mm Thick, Stainless Steel, Polished, Set of 2

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ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.675 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 2

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.750 in. OD, Stainless Steel, Polished, 0.12 in. Thick, Set of 10

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 22mm OD, 3.2mm Thick, Chromoly, Black Oxide, Set of 2

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ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.875 in. OD, Chromoly, Black Oxide, O.D. Chamfer, 0.015 in. Thick, Set of 10

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