Socket screws have an allen wrench drive.

Metric socket screws, Zinc plated class 12.9 alloy steel, 0.5mm, 14mm

Socket head screw

Socket cap

Socket caps have a small cylindrical head with tall vertical sides. Allen (hex socket) drive is a six-sided recess for use with an allen wrench (hex key).

  • Zinc plated class 12.9 alloy steel

See also

Set screw

Metric set screws

Screws with no head and machine threads for use in a tapped hole.

Shoulder bolt

Metric shoulder bolts

Screws with an unthreaded shoulder that is larger in diameter than the threads. Also known as stripper bolts.