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, 1/4 in. ID, 0.500 in. OD, 0.063 Thick, Cad Plated, Each

ARP Washer, Hardened, High Performance, Flat, 1/4 in. ID, 0.500 in. OD, 0.063 Thick, Cad Plated, Each

$0.56

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

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

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

$2.52

ARP Washer, Hardened, High Performance, Chamfer, Flat, 6mm ID, 22.6mm OD, 4.2mm Thick, Stainless Steel, Polished, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 6mm ID, 22.6mm OD, 4.2mm Thick, Stainless Steel, Polished, Each

$6.24

ARP Washer, Hardened, High Performance, Chamfer, Flat, 7/6 in. ID, 0.765 in. OD, Chromoly, Black Oxide, 0.09 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 7/6 in. ID, 0.765 in. OD, Chromoly, Black Oxide, 0.09 in. Thick, Set of 10

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 5/16 in. ID, 0.675 in. OD, 0.120 Thick, Chromoly, Black Oxide, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 5/16 in. ID, 0.675 in. OD, 0.120 Thick, Chromoly, Black Oxide, Each

$2.10