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, 10mm ID, 22mm OD, 3.2mm Thick, Chromoly, Black Oxide, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 22mm OD, 3.2mm Thick, Chromoly, Black Oxide, Each

$8.26

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.655 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.655 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 10

$7.63

ARP Washer, Hardened, High Performance, Chamfer, Flat, 5/16 in. ID, 0.625 in. OD, 0.120 Thick, Stainless Steel, Polished, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 5/16 in. ID, 0.625 in. OD, 0.120 Thick, Stainless Steel, Polished, Set of 2

$7.13

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.625 in. OD, Chromoly, Black Oxide, 0.063 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.625 in. OD, Chromoly, Black Oxide, 0.063 in. Thick, Set of 2

$4.29

ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 16mm OD, 1.9mm Thick, Stainless Steel, Polished, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 16mm OD, 1.9mm Thick, Stainless Steel, Polished, Set of 10

$27.80

ARP Washer, Hardened, High Performance, Flat, 12mm ID, 22.2mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Flat, 12mm ID, 22.2mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 2

$4.65