5/8-11 x 3 1/4 Coarse Thread Socket Head Cap Screw Black DFAR WEBZ The split lock washer helps

The split lock washer helps to prevent the screw or bolt from loosening due to vibration or movement

The pan head provides a flush finish

This 5/16-18 x 5/8 carriage bolt is made of steel and has a zinc finish for corrosion resistance

and have a flat head that sits flush with the surface of the material

34mm thread pitch provide a secure hold in various materials

5/8-11 x 3 1/4 Coarse Thread Socket Head Cap Screw Black DFAR WEBZ The split lock washer helpsThe 5 8 11 x 3 1 4 Coarse Thread Socket Head Cap Screw Black DFAR is a high quality fastener designed for demanding applications. It is made from durable steel and features a black oxide finish for corrosion resistance. The coarse thread design provides a secure hold in a variety of materials. The socket head allows for easy installation and removal using a hex key. This screw meets the requirements of the Defense Federal Acquisition Regulation