Tenders for Supply of Hex. Head Bolt & Nuts M 16 X 65Mm Product Grade C M.S. Black.Material And Specification Is: 1363 Part-I/2002 4Th Rev. And Is:1363 Part - Iii/02 4 Th Rev. Property C Lass 4.6 For Bolt And Property Class 4.0 For Nut. Warranty Period: 30 Months After The Date Of Delivery