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, 3/4 in. ID, 2.000 in. OD, Chromoly, Black Oxide, 0.275 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 3/4 in. ID, 2.000 in. OD, Chromoly, Black Oxide, 0.275 in. Thick, Each

$14.16

ARP Washer, Hardened, High Performance, Chamfer, Flat, 9mm ID, 20.6mm OD, 3mm Thick, Chromoly, Black Oxide, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 9mm ID, 20.6mm OD, 3mm Thick, Chromoly, Black Oxide, Each

$3.22

ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 22.2mm OD, 2.3mm Thick, Chromoly, Black Oxide, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 22.2mm OD, 2.3mm Thick, Chromoly, Black Oxide, Set of 10

$21.24

ARP Washer, 1/2 ID 1.00 OD Chamfer

ARP Washer, 1/2 ID 1.00 OD Chamfer

$2.14

ARP Washer, Hardened, High Performance, Chamfer, Flat, 1/4 in. ID, 0.550 in. OD, 0.075 Thick, Stainless Steel, Polished, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 1/4 in. ID, 0.550 in. OD, 0.075 Thick, Stainless Steel, Polished, Each

$1.54

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.715 in. OD, Stainless Steel, Polished, 0.12 in. Thick, Each

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.715 in. OD, Stainless Steel, Polished, 0.12 in. Thick, Each

$3.05