1 ) Hex head screw M6 x 50mm long as per IS 1364 part 2 property class 8. 8 2 ) Hex head screw M6 x 12mm long as per IS 1364 part 2 property class 8. 8 3 ) Hex head screw M5 x 50mm long as per IS 1364 part 2 property class 8. 8 4 ) Hex head screw M4 x 50mm long as per IS 1364 part 2 property class 8. 8