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, 0.625 in. OD, 0.120 Thick, Stainless Steel, Polished, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 5/16 in. ID, 0.625 in. OD, 0.120 Thick, Stainless Steel, Polished, Each

$3.47

ARP Washer, Hardened, High Performance, Flat, 5/8 in. ID, 1.300 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 5/8 in. ID, 1.300 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

$4.73

ARP Washer, Hardened, High Performance, Flat, 5/16 in. ID, 0.812 in. OD, 0.120 Thick, Chromoly, Black Oxide, Set of 10

ARP Washer, Hardened, High Performance, Flat, 5/16 in. ID, 0.812 in. OD, 0.120 Thick, Chromoly, Black Oxide, Set of 10

$18.66

ARP Washer, Hardened, High Performance, Chamfer, Flat, 5/16 in. ID, 0.655 in. OD, 0.075 Thick, Stainless Steel, Polished, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 5/16 in. ID, 0.655 in. OD, 0.075 Thick, Stainless Steel, Polished, Set of 2

$4.20

ARP Washer, 1/2 ID 1.00 OD No Chamfer

ARP Washer, 1/2 ID 1.00 OD No Chamfer

$18.30