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, 25.1mm OD, 1.7mm Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Flat, 6mm ID, 25.1mm OD, 1.7mm Thick, Chromoly, Black Oxide, Set of 2

$5.33

ARP Washer, Flat, Chromoly, Black Oxide, .312 in. I.D, .812 in. O.D, .120 in. Thick, Pair

ARP Washer, Flat, Chromoly, Black Oxide, .312 in. I.D, .812 in. O.D, .120 in. Thick, Pair

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ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.812 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.812 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 2

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

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

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

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

$2.61