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 Washers, Chromoly, Black Oxide, .375 in. I.D, .443 in. O.D, Set of 10

ARP Washers, Chromoly, Black Oxide, .375 in. I.D, .443 in. O.D, Set of 10

$80.78

ARP Washer, Hardened, High Performance, Flat, 10mm ID, 19.1mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Flat, 10mm ID, 19.1mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 2

$4.94

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.725 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.725 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Set of 10

$20.52

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.655 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.655 in. OD, Stainless Steel, Polished, 0.09 in. Thick, Set of 2

$4.10