ARP insert washers are designed to protect the top of the bolt holes from galling or collapsing around studs or bolts. They are fully CNC-machined from premium through-hardened 8740 stock.

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.655 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.655 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 22.2mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 22.2mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 10

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ARP Washer, Hardened, High Performance, Flat, 9/16 in. ID, 1.000 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 9/16 in. ID, 1.000 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 22.2mm OD, 2.3mm Thick, Stainless Steel, Polished, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 22.2mm OD, 2.3mm Thick, Stainless Steel, Polished, Each

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 7/6 in. ID, 0.705 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 7/6 in. ID, 0.705 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Set of 10

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ARP Washer, Hardened, High Performance, Flat, 5/16 in. ID, 0.655 in. OD, 0.075 Thick, Stainless Steel, Polished, Set of 10

ARP Washer, Hardened, High Performance, Flat, 5/16 in. ID, 0.655 in. OD, 0.075 Thick, Stainless Steel, Polished, Set of 10

$15.39