#10 x 3/16" x 13/32" Zinc Plated Grade 2 Steel External Tooth Lock Washers

Diameter: 3/16"
Diameter 2: 13/32"
Thickness: 3/64"
Material: Steel
Finish: Zinc
Hardness: Grade 2
Nominal Size: #10 (3/16")
Style: External Tooth
Type: Lock Washer
Application: Round|pan|or binding head

Box of 100.

The purpose for a lock washer is to prevent threaded fasteners from loosening by creating friction between the fastener and the mounting surface.