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, 6mm ID, 22.6mm OD, 4.2mm Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Flat, 6mm ID, 22.6mm OD, 4.2mm Thick, Chromoly, Black Oxide, Set of 2

$11.22

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.995 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.995 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

$2.10

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.750 in. OD, Chromoly, Black Oxide, 0.012 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.750 in. OD, Chromoly, Black Oxide, 0.012 in. Thick, Set of 2

$4.52

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

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

$2.87