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ARP black chamfer washers, 5/16 in ID by .550 in OD, sold in a 10‑pack, provide hardened mating surfaces for bolted assemblies. These washers distribute load, protect fasteners and mating surfaces from damage, and are useful where precise hardware stacking and clamp distribution are required during engine assembly or other high‑load installations.
ARP 5/16in ID .550inOD Black Chamfer Washers (10 pack)
