Nominal Size: 1-3/4"
Inside Diameter: 1-7/8"
Outside Diameter: 4"
Thickness: 3/16"
Material: Steel
Finish: Zinc
Thread Type: USS
Hardness: Grade 2
Type: Flat Washer
Box of 20.
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.
