A coil spring can be wound in either a left hand or right hand direction, similar to a screw type thread. In applications such as one spring operating inside another, it is necessary to coil the springs so that the helices are in opposite directions, right and left. If a spring screws onto a thread, the direction of the helix should match that of the thread.

✦A left hand wound spring will spiral in the same direction as a Left Hand threaded screw.

✦A left hand wound spring will spiral in the same direction as a Left Hand threaded screw.