1/4 x 5/16 x 3/4 Zinc Plated Grade 8 Steel USS Flat Washers
Diameter: 5/16Diameter 2: 3/4Thickness: 1/16Material: SteelFinish: Yellow ZincThread Type: USSHardness: Grade 8Nominal Size: 1/4Type: Flat WasherA flat washer is a thin, usually round, plate with a hole in the middle that is normally used to distribute the load of a threaded fastener. USS flat washers have a large, wider body. SAE flat washers are machined to a tighter specification and have a smaller outside diameter.