TYPES OF SCREW HEADS FUNDAMENTALS EXPLAINED

A U-travel screw includes a helical thread by having an angle acute plenty of being driven by a hammer or force from an arbor press, and so has a domed head without any implies of turning it.[90] These are most often driven into plastics with a pre-drilled pilot hole. See also[edit] Pan Washer Head. This head variety is a mix of a screw and a wash