COACH SCREW
Definition
A <COACH SCREW> is a <CYLINDRICAL THREADED FASTENER> and a <FULLY THREADED FASTENER> and a <SCREW> that is a heavy duty screw designed for metal to timber connections, or to join heavy timbers. Also known as lag bolts or lag screws, they have a square or hexagonal head engineered to be used with a wrench, spanner, or pliers