3/8 Internal Tooth Lock Washer Black Zinc and Bake #8 while the square necks prevent

while the square necks prevent the bolts from turning when tightened

5/16-18 x 1 1/4" Ribbed Neck Carriage Bolt

It is made of zinc-plated steel for corrosion resistance and durability

Its 3/4-inch diameter and 4-inch length provide exceptional holding power

These bolts are designed for use in outdoor applications

3/8 Internal Tooth Lock Washer Black Zinc and Bake #8 while the square necks prevent3 8" internal tooth lock washers are designed to prevent nuts and bolts from loosening due to vibration or movement. These washers have teeth on the inside diameter that bite into the mating surface, creating a secure hold. They are made of durable black zinc and bake material, providing excellent corrosion resistance and long lasting performance. These lock washers are commonly used in automotive, industrial, and construction applications where