Standard :- As per Din 934
Sizes :- Brass Hex Nuts, Metric Hex Nuts, Heavy Hex Nuts, Full Brass Hex Nuts, Brass Hexagonal Nuts, Brass Metric Half Nuts, Brass Hex Full Nuts, Brass Hex Lock Nuts, From 2 mm to 30 mm in thread size  machined nuts bar turned fasteners nuts
Threads :- M3 M4 M5 M6 M8 M10 m12 M16 M20 3mm 2mm 3.5mm 4mm 5mm 6mm 8mm 10mm 12mm 16mm 20mm 1/8 5/32 3/16 1/4 5/16 3/8 1/2 5/8 3/4 1 BSP UNEF UNF UNC Metric BA threaded screws fasteners fittings nuts