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, Stainless Steel, Polished, 0.063 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.625 in. OD, Stainless Steel, Polished, 0.063 in. Thick, Each

$1.33

ARP Washer, Hardened, High Performance, Flat, 1/2 in. ID, 1.300 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Flat, 1/2 in. ID, 1.300 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 10

$25.56

ARP Washers, Steel, Black Zinc, .438 in. Inside Diameter, .875 in. Outside Diameter, Set of 10

ARP Washers, Steel, Black Zinc, .438 in. Inside Diameter, .875 in. Outside Diameter, Set of 10

$96.01

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

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

$0.56

ARP Washer, Hardened, High Performance, Chamfer, Flat, 7/6 in. ID, 0.675 in. OD, Chromoly, Black Oxide, rod bolt washer, 0.062 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 7/6 in. ID, 0.675 in. OD, Chromoly, Black Oxide, rod bolt washer, 0.062 in. Thick, Set of 10

$18.66