Flat washers distribute the load of a fastener over a wider surface area, helping protect the material and prevent damage as the fastener is tightened.

Nominal Size: 3/16" (#10)
Inside Diameter: 13/64"
Outside Diameter: 7/16"
Thickness: 1/32"
Material: Brass
Style: S Pattern
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.