1 1/4-7 x 5 1/2 Coarse Thread Socket Head Cap Screw Black DFAR MPT188 The screws are also zinc-plated

The screws are also zinc-plated for corrosion resistance

simplifying installation

The sharp point easily penetrates metal

The screw is made of steel and has a zinc and wax coating for added durability and corrosion resistance

This 1/2" internal tooth lock washer is made of zinc-plated steel for superior corrosion resistance and durability

1 1/4-7 x 5 1/2 Coarse Thread Socket Head Cap Screw Black DFAR MPT188 The screws are also zinc-plated1 1 4 7 x 5 1 2 Coarse Thread Socket Head Cap Screw Black DFAR is a high strength fastener designed for use in demanding applications. It is made of alloy 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