ARP quality general purpose washers have an oversized I.D. to clear most under-bolt head radii. They're available in your choice of black oxide or rust-resistant stainless steel for 1/4, 5/16, 3/8, 7/16, and 1/2 in. shank bolts and studs. Whatever the application, these washers are sure to do the job.

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 19.1mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 12mm ID, 19.1mm OD, 3mm Thick, Chromoly, Black Oxide, Set of 2

$4.94

Trick Flow Head Bolt Washers, Steel, Black Oxide, .450 in. to .813 in, .115 in. Thick, Set of 10

Trick Flow Head Bolt Washers, Steel, Black Oxide, .450 in. to .813 in, .115 in. Thick, Set of 10

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ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.675 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 2

ARP Washer, Hardened, High Performance, Flat, 3/8 in. ID, 0.675 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 2

$4.52