Low Head Socket Cap Screws

Low head socket cap screws have a hex socket (Allen) drive.  The screws are tightened with a hex key or allen wrench.  Commonly found in machine assembly where you do not have enough space to tighten with a wrench or socket.  The low head is designed where there is not enough room for a normal socket head cap screw.  Black oxide is the most popular finish, but low head socket cap screws also come in zinc and stainless steel.