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, Flat, 3/8 in. ID, 0.625 in. OD, Cad Plated, 0.063 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.625 in. OD, Cad Plated, 0.063 in. Thick, Each

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 22.2mm OD, 2.3mm Thick, Chromoly, Black Oxide, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 22.2mm OD, 2.3mm Thick, Chromoly, Black Oxide, Each

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ARP Washers, Chromoly, Black Oxide, .437 in. I.D, .875 in. O.D, Pair

ARP Washers, Chromoly, Black Oxide, .437 in. I.D, .875 in. O.D, Pair

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 19.2mm OD, 2.3mm Thick, Stainless Steel, Polished, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 19.2mm OD, 2.3mm Thick, Stainless Steel, Polished, Each

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