Supply Of Hex. Head Bolt & Nut M10 X 40 Mm Product Grade C, M.s.black Matl.& Specn : Is: 1363 Part - 1 / 2023 6th Rev. Or Latest, And Is: 1363 Part - 3 / 2018 5th. Rev. Or Latest, Property Class 4 .6 For Bolt And Property Class 5 For Nut..