5/8″ x 11/16″ x 1-3/4″ Zinc Plated Grade 8 Steel USS Flat Washers
Diameter: 11/16″ Diameter 2: 1-3/4″ Thickness: 9/64″ Material: Steel Finish: Blue Rinsed Zinc Thread Type: USS Hardness: Grade 8 Nominal Size: 5/8″ 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.