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, 3/8 in. ID, 0.655 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.655 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 2

$1.61

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.655 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.655 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Set of 2

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.625 in. OD, Chromoly, Black Oxide, 0.063 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.625 in. OD, Chromoly, Black Oxide, 0.063 in. Thick, Set of 2

$4.52

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.705 in. OD, Chromoly, Black Oxide, 0.09 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.705 in. OD, Chromoly, Black Oxide, 0.09 in. Thick, Set of 2

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 39.4mm OD, 7mm Thick, Chromoly, Black Oxide, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 39.4mm OD, 7mm Thick, Chromoly, Black Oxide, Each

$19.02