5 SIMPLE TECHNIQUES FOR TYPES OF SCREWDRIVER HEADS

A socket cap screw, also known as a socket head capscrew, socket screw, or Allen bolt, is usually a type of cap screw by using a cylindrical head and hexagonal generate gap. The phrase socket head capscrew commonly refers to the type of threaded fastener whose head diameter is nominally 1.five occasions that from the screw shank (big) diameter, wit