THE GREATEST GUIDE TO TYPES OF SCREW HEADS

in the event you consider the head, you will note When they are countersink or non-countersunk in design, so listen to the head before you decide to make the purchase. A triple-square screw is often known as XZN. This screw is developed by overlaying 3 symmetrical squares to form twelve uniformly spaced points that happen to be ninety levels. The