Diameter: 3/8"
Diameter 2: 5/32"
Thickness: 3/64"
Material: Aluminum
Thread Type: SAE
Nominal Size: #6
Type: Flat Washer

Box of 48.

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.