Hexagonal Head Bolts And Nut Assembled Having Isi Marked Product Grade 'C', M.S., Bla Ck Matl. & Spec. Is:1363 (Part - 1)/2023 (6Th Rev.) And Is: 1363 (Part- 3) / 2018 (5Th. Rev.) Size 10 X 2 5 Mm. Property Class 4.6 For Bolt And Property Class 5 For Nut. [ Warranty Period: 30 Months After Th E Date Of Delivery ] ]