A hex nut is a type of metal fastener that has six sides. Most nuts are cut in a hexagonal shape, since it seems to be the easiest shape to grasp. Nearly every nut on the market has a specific use, though the hexagonal nut can almost always be used in any situation.
|M3 – M72||Class 5, 6, 8, 10||PLAIN
|#12 – 3″||GRADE 2 , 5, 8
ASTM A194 2H