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, 1/2 in. ID, 1.300 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 1/2 in. ID, 1.300 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

$3.01

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.875 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.875 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 2

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ARP Washer, Hardened, High Performance, Flat, 6mm ID, 25.1mm OD, 1.7mm Thick, Chromoly, Black Oxide, Each

ARP Washer, Hardened, High Performance, Flat, 6mm ID, 25.1mm OD, 1.7mm Thick, Chromoly, Black Oxide, Each

$2.52

ARP Washer, Insert, Washer, Insert, 7/16 in. ID - .812 in. OD, Each

ARP Washer, Insert, Washer, Insert, 7/16 in. ID - .812 in. OD, Each

$17.73

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

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

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 15mm OD, 2mm Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 15mm OD, 2mm Thick, Chromoly, Black Oxide, Set of 2

$6.90