4-40 x 1/4" Security Machine Screw - Button Hex Socket Head - Alloy Steel - Black Oxide - 100 Pk

Socket Set Screw, Cup Point, Steel Alloy, Thermal Black Oxide, UNC, 100 Pk, 6-32 x 3/16" Set screws have forged sockets, insuring maximum strength and resistance to cracking in the corners. Smooth, flat, deep sockets, free of machining tears or roach chips.

Cap Screws are designed to go through a hole or nut that is pre-tapped to form a mating thread for that screw. Socket head screws for use with allen key.

1/4-20X1 3/4 Coarse Thread Socket Head Cap Screw Plain. Cap Screws are designed to go through a hole or nut that is pre-tapped to form a mating thread for that screw. Socket head screws for use with hex or allen wrench

Low Socket Heads are high strength, precision fasteners that are designed to be used in applications where head height clearance is a problem. Because of their reduced head heigth and smaller socket size, they normally cannot be preloaded as high as a standard socket head cap screw.

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.