1/4-20x1 Coarse Thread Button Head Socket Cap Screw Plain. Socket Cap Screws are designed to go through a hole or nut that is pre-tapped to form a mating thread for that screw. Allen/Hex Keys are used to drive the screw. Cylindrical head with a rounded top.

Socket Head Cap screws are ideal for precision work with close tolerances and applications needing a well tooled appearance. Allen/Hex Keys are used to drive the screw.Socket Head Cap screws supply greater tensile strength than equivalent Hex Head Caps screws, while requiring less surface area to counterbore.