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, 0.655 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.655 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Set of 2

$4.10

ARP Washer, Insert, Washer, Insert, .995 OD X 1/2 ID

ARP Washer, Insert, Washer, Insert, .995 OD X 1/2 ID

$9.12

ARP Washer, Hardened, High Performance, Flat, 1/4 in. ID, 0.550 in. OD, 0.075 Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Flat, 1/4 in. ID, 0.550 in. OD, 0.075 Thick, Chromoly, Black Oxide, Set of 2

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 19.1mm OD, 3mm Thick, Stainless Steel, Polished, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 19.1mm OD, 3mm Thick, Stainless Steel, Polished, Set of 2

$5.74

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

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

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 22mm OD, 4.1mm Thick, Stainless Steel, Polished, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 22mm OD, 4.1mm Thick, Stainless Steel, Polished, Set of 10

$94.02