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, 12mm ID, 22.2mm OD, 2.3mm Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 22.2mm OD, 2.3mm Thick, Chromoly, Black Oxide, Set of 2

$4.94

ARP Washer, 7/16ID Stainless Steel No Chamfer 10Pk

ARP Washer, 7/16ID Stainless Steel No Chamfer 10Pk

$25.95

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.750 in. OD, Stainless Steel, Polished, 0.12 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.750 in. OD, Stainless Steel, Polished, 0.12 in. Thick, Set of 10

$26.88

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

$25.17

ARP Washer, Hardened, High Performance, Flat, 5/8 in. ID, 2.000 in. OD, Chromoly, Black Oxide, 0.275 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 5/8 in. ID, 2.000 in. OD, Chromoly, Black Oxide, 0.275 in. Thick, Each

$19.05

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