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South Coast Fasteners stocks the 5/16" Flat Washers (USS), Medium Carbon Through Hardened Steel, Zinc Cr+3 (Dims: 3/8" I.D. x 7/8" O.D.), USA for fast 3-5 day shipping. It is made from Medium Carbon Through Hardened Steel with a Zinc Cr+3 finish. Designed for distributing bearing pressure under a bolt or nut, it is part of our USA Flat Washers line, stocked across industries such as Automotive and HVAC.
Pairs well with Hex Bolts and Finished Hex Nuts to complete the assembly. Please contact us if you need assistance in selecting the right product or placing an order.