Square Nut
Square nuts
Square nuts originally designed to go with square head bolts, they have generally been replaced by the cheaper hexagon nut or the square pressed nut
Metric Coarse Square Thin Nut Stainless-Steel-A2 DIN562
Metric Coarse Square Machine Screw Nut Stainless-Steel-A2 DIN557
Metric Coarse Square Anchor Foundation Nut Class-5 DIN798
Metric Coarse Square Machine Screw Nut Grade-5.6 DIN557
Metric Coarse Square Thin Nut Grade-4.6 DIN562
UNC Square Heavy Nut Steel B18.2.2
UNC Square Nut Steel B18.2.2T1
UNC Square Machine Screw Nut Brass B18.6.3
UNC Square Machine Screw Nut Stainless-Steel-A2 B18.6.3
UNC Square Machine Screw Nut Mild Steel A-A563 B18.6.3