#2 Internal Tooth Lock Washer Zinc 4-40-2 The 1/4-20 refers to the

The 1/4-20 refers to the bolt's diameter and thread pitch

It features a 3/8-24 thread size

and automotive applications where high strength and corrosion resistance are required

They are designed to be used with nuts and washers of the same size and grade

as the square head prevents the bolt from turning when tightened

#2 Internal Tooth Lock Washer Zinc 4-40-2 The 1/4-20 refers to the#2 Internal Tooth Lock Washer Zinc is a type of washer used to secure bolts and nuts in place. It is made of zinc plated steel and has a serrated inner surface that bites into the mating surface, preventing the fastener from loosening due to vibration or other forces. This washer is commonly used in automotive, construction, and other industrial applications where a secure and reliable connection is required.