5/16 x 7/8 Plain Grade 2 Steel USS Flat Washers (Box of 435)
Diameter: 5/16Diameter 2: 7/8Thickness: 5/64Material: SteelFinish: PlainThread Type: USSHardness: Grade 2Nominal Size: 5/16Type: Flat WasherBox of 435.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.