Diameter: 3/4″
Thickness: 21/32″
Material: Steel
Finish: Zinc
Driver Type: 1-1/8″ Wrench
Thread Size: 10 (Coarse)
Type: Square Nut

Box of 10.

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 (though also greater resistance to tightening). Square nuts are typically mated with square-headed bolts.