Square Nuts are just four-sided nuts, but 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. Square nuts are typically mated with square-headed bolts.
Square Nuts Diameters
Square Nuts are available on the FCH Network with Imperial/US diameters that range from #1 to 3 and with Metric diameters that range from M1.2 to M20. The length of Square Nuts is usually measured from the point to the underside of the head.
Square Nuts are available on the FCH Network in materials that range from Steel to Fiber
Square Nuts Finishes
Square Nuts are available on the FCH Network in finishes or coatings that range from Plain to Phosphate