A 19 Hex Nut is offered by us that is one of the most common nuts available and are used with anchors, bolts, screws, studs, and threaded rods and on any other fastener that has machine screw threads. Hex is short for hexagon, which means it has six sides. The offered nut is easy to turn because it has six parallels. Because hex nut has six sides, people can turn a fastener one-sixth of the way to reach the next parallel. 19 Hex Nut is very useful.