1/2-13 x 2 1/4 Coarse Thread Socket Head Cap Screw Black DFAR APW188 These washers are designed to

These washers are designed to prevent nuts and bolts from loosening due to vibration or other external forces

This 1/4-28 Heavy Hex Nut is made of durable steel and finished with a zinc plating for corrosion resistance

This 8-18 x 5/16 slotted indented hex washer self tapping screw is a fully threaded screw made of steel and coated with zinc for corrosion resistance

which provides a secure hold and a clean

1/2-13 x 2 1/4 Coarse Thread Socket Head Cap Screw Black DFAR APW188 These washers are designed to1 2 13 x 2 1 4 Coarse Thread Socket Head Cap Screw Black DFAR is a type of fastener used to secure two or more objects together. It has a hexagonal head with a socket in the center, and a threaded shank. The screw is made of steel and has a black oxide finish. The coarse thread has a pitch of 13 threads per inch, and the screw has a length of 2 1 4 inches. The screw meets the requirements of the Defense Federal Acquisition Regulation Supplement