Bolt Ms Hex Head M 16 X 50 With Nut. As Per Specn. Mat. Spec.:- Steel, Is-1363/2002, P T-I For Bolt & Is: 1363/2002 Pt-Iii For Nut, Property Class 4.6 For Bolt And 5 For Nut, With Latest Revision An D Amendments. [ Warranty Period: 30 Months After The Date Of Delivery ] ]