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, 9mm ID, 20.6mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 9mm ID, 20.6mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 2

$6.44

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, 0.705 in. OD, Chromoly, Black Oxide, 0.09 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.705 in. OD, Chromoly, Black Oxide, 0.09 in. Thick, Set of 10

$18.00

ARP Washer, Hardened, High Performance, Chamfer, Flat, 5/16 in. ID, 0.550 in. OD, 0.095 Thick, Chromoly, Black Oxide, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 5/16 in. ID, 0.550 in. OD, 0.095 Thick, Chromoly, Black Oxide, Set of 10

$18.66

ARP Washer, Hardened, High Performance, Chamfer, Flat, 7/6 in. ID, 0.750 in. OD, Chromoly, Black Oxide, rod bolt washer, 0.073 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 7/6 in. ID, 0.750 in. OD, Chromoly, Black Oxide, rod bolt washer, 0.073 in. Thick, Set of 2

$4.69