set of ht hexagonal head galvanized iron screw with nut fully threaded of size m10 x 50 mm conforming to is 1364 pt 2 3 2002 or latest grade 8 8 for screw and grade 8 for nut with 1 no check nut to is 1364 pt 4 2003 or latest grade 5 2 nos of plain washer to is 2016 1 no spring washer to is 3063 or latest all items galvanized set of ht hexagonal head galvanized iron screw with nut fully threaded of size m10 x 50 mm conforming to is 1364 pt 2 3 2002 or latest grade 8 8 for screw