5/16" x 45/64" Zinc Plated Grade 2 Steel Internal Tooth Lock Washers LWS-252
The item pictured is an approximation of what you will receive. Most of our fasteners are commodity items and may vary in finish, thread length, head stamping, and look from one batch to another.
Part Number: MF03983
Diameter 2: 45/64"
Hardness: Grade 2
Nominal Size: 5/16"
Style: Internal Tooth
Type: Lock Washer
Application: Smaller head screws
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.