Turnbuckle

A metal loop, sleeve, or solid body with end pulls, having both ends threaded or one end threaded and the other end designed to accommodate a swivel. Items with both ends threaded shall have right hand screw threads on one end and left hand screw threads on the other. It may include lock nuts, check nuts, jam nuts, and/or terminal attachmen (s) such as hooks, rings, and the like. It is designed to regulate the distance (take-up) between two points by turning. See also pelican hook and turnbuckle assembly; and tie rod, tensioning, threaded end.