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, Flat, 3/8 in. ID, 0.725 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.725 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Each

$2.07

ARP Washer, Hardened, High Performance, Flat, 5/16 in. ID, 0.675 in. OD, 0.120 Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Flat, 5/16 in. ID, 0.675 in. OD, 0.120 Thick, Chromoly, Black Oxide, Set of 2

$4.69

ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 19.2mm OD, 2.3mm Thick, Chromoly, Black Oxide, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 10mm ID, 19.2mm OD, 2.3mm Thick, Chromoly, Black Oxide, Set of 10

$7.41

ARP Washer, Hardened, High Performance, Flat, 5/16 in. ID, 0.655 in. OD, 0.075 Thick, Chromoly, Black Oxide, Set of 10

ARP Washer, Hardened, High Performance, Flat, 5/16 in. ID, 0.655 in. OD, 0.075 Thick, Chromoly, Black Oxide, Set of 10

$7.41

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.625 in. OD, Stainless Steel, Polished, 0.063 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.625 in. OD, Stainless Steel, Polished, 0.063 in. Thick, Each

$1.33

ARP Washer, Insert, Washer, Insert, Chromoly Steel, Black Oxide, .313 in. I.D, .380 in. O.D, Set of 10

ARP Washer, Insert, Washer, Insert, Chromoly Steel, Black Oxide, .313 in. I.D, .380 in. O.D, Set of 10

$78.46