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, 1/4 in. ID, 0.550 in. OD, 0.075 Thick, Chromoly, Black Oxide, Set of 10

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 1/4 in. ID, 0.550 in. OD, 0.075 Thick, Chromoly, Black Oxide, Each

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Trick Flow Head Bolt Washers, .510 in. I.D, .870 in. O.D, .120 in. Thick, Set of 10

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

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ARP Washer, Hardened, High Performance, Flat, 6mm ID, 22.6mm OD, 4.2mm Thick, Chromoly, Black Oxide, Set of 2

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