Manley hardened head bolt washers are available for a variety of applications. They receive a special heat treatment to prevent galling.

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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, Flat, 10mm ID, 19.1mm OD, 3mm Thick, Stainless Steel, Polished, Each

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

$2.84

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.812 in. OD, Stainless Steel, Polished, 0.12 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 7/6 in. ID, 0.812 in. OD, Stainless Steel, Polished, 0.12 in. Thick, Each

$3.05

ARP Washer, Hardened, High Performance, Flat, 1/2 in. ID, 0.875 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Flat, 1/2 in. ID, 0.875 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 10

$19.14

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.725 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.725 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 10

$9.00