IS 2636-1972
Wing nuts with rounded wings
IS 1364
Hexagon thin nuts(chamfered)
IS 1364-2002
Hexagon nuts,Style 1
IS 2232-1967
Hexagon slotted and castle nuts
IS 7002-1972
Prevailing torque type hexagon thick nuts with nonmetallic insert
IS 7790-1975
Hexagon domed cap nuts