Standard & Other names: HSFG Nut, Heavy Hex Nuts, Hex Nuts, IS 6623 Nut, High Strength Structural Nuts, HSFG BOLT/Nut & Washer, EN14399-4 Nut, BSIII Rev 7 HSFG Nut, HR Nut, HV Nut, 8 Grade Nuts, 10 Grade Nuts, Zink Flake Coated Nuts, ISO 4032