LITTLE KNOWN FACTS ABOUT TYPES OF SCREW HEADS.

A U-generate screw provides a helical thread by having an angle acute sufficient to get pushed by a hammer or force from an arbor push, and therefore includes a domed head with no suggests of turning it.[ninety] These are most frequently pushed into plastics that has a pre-drilled pilot hole. See also[edit] The TA is usually a style of screw push