Square Nuts

Description

A square nut is a four-sided nut.

Compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening. They are also much less likely to become rounded-off after repeated loosening/tightening cycles.

Square nuts can be tightened with pliers or a wrench, making them ideal for use in blind locations. The user can tighten and loosen a square shaped fastener without having it in sight, as long as a sturdy grip can be obtained on two opposing sides of the nut or bolt head.