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, 0.750 in. OD, Chromoly, Black Oxide, 0.09 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.750 in. OD, Chromoly, Black Oxide, 0.09 in. Thick, Set of 2

$4.52

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

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

$24.60

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.705 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.705 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Each

$2.10

ARP Washer, 7/16ID Stainless Steel No Chamfer 10Pk

ARP Washer, 7/16ID Stainless Steel No Chamfer 10Pk

$25.95

ARP Washer, Hardened, High Performance, Flat, 5/16 in. ID, 0.812 in. OD, 0.120 Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Flat, 5/16 in. ID, 0.812 in. OD, 0.120 Thick, Chromoly, Black Oxide, Set of 2

$4.69