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, Stainless Steel, Polished, 0.09 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.655 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Set of 10

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 39.4mm OD, 7mm Thick, Chromoly, Black Oxide, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 39.4mm OD, 7mm Thick, Chromoly, Black Oxide, Each

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ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 2.000 in. OD, Chromoly, Black Oxide, 0.275 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 2.000 in. OD, Chromoly, Black Oxide, 0.275 in. Thick, Each

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ARP Washer, Hardened, High Performance, Flat, 10mm ID, 19.1mm OD, 3mm Thick, Stainless Steel, Polished, Set of 10

ARP Washer, Hardened, High Performance, Flat, 10mm ID, 19.1mm OD, 3mm Thick, Stainless Steel, Polished, Set of 10

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 9mm ID, 20.6mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 9mm ID, 20.6mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 2

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