Bolt Ms Hex Head 16X100 With Nut Specn: Bis Specification No: Steel, Is-1363,Pt-I/2002 Or Latest For Bolt And Is:1363(Pt-Iii)/2002 Or Latest For Nut. Property Class 4.6 For Bolt And 5 For Nut. [ W Arranty Period: 30 Months After The Date Of Delivery ] ]