![]() BUTTON CAP: Similar to a socket head cap screw but with a wider dome shaped head and a lower profile. |
SOCKET CAP: An externally threaded fastener with unified threads, a cylindrical head with a flat chamfered top surface, knurled cylindrical sides and a hexagonal recess. Used when the top of the screw head is to be flush with one of the assembly surfaces |
SHOULDER BOLT - STRIPPER BOLT: Ground to very close tolerances, with a thick shoulder usually running 80 percent of the shaft length. Does not have a point. The socket head is a recessed head in which the sides of the recess are parallel to the body axis. |
![]() HEX KEY: A simple, small and light tool used to drive screws and bolts that have a hexagonal socket in the head. Tool can be used with a headless screw. |
FLAT CAP PLAIN: Similar to a socket head cap screw but with an 82 degree countersunk flat head. |