A hex nut is a six sided nut that fastens screws and bolts efficiently and securely. They are the most common hexagonal fastener that has internal threads that screw on to the shank of a bolt or a hex cap screw. Because a hex nut has six sides, they have good granularity angles for tools to utilise. It takes one sixth of a rotation to obtain the next side of the hexagon and grip is optimal. This makes them great for those tight spots.
Hex Nuts are designed to give the user an easy assembling experience.