1/4″ x 5/16″ x 3/4″ Zinc Plated Grade 2 Steel USS Flat Washers
Diameter: 5/16″ Diameter 2: 3/4″ Thickness: 3/32″ Material: Steel Finish: Zinc Thread Type: USS Hardness: Grade 2 Nominal Size: 1/4″ Type: Flat Washer A 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.