Shank: The smooth area of the fastener between the head and the thread. Screw types vary and some screws do not have a smooth shank. Thread: The ridge that wraps around the cylinder and forms a helix.

The world is literally kept from coming apart by screws and bolts, and yet we don’t often ... Hot slugs of metal are struck by dies that form the head profile and punch the center hole.

Although I own and stock dozens of different types of screws ... than using bolts in low-strength applications. A great thing about sheetmetal screws is that their socket head allows you to ...