Hexagonal Head Bolts & Nuts 12 X 40 Mm, Products Grade-C, M.S. Black Confirming To I S:1363-(Part-1) 2002 For Bolts; Products Grade-C, M.S. Black Confirming To Is:1363-(Part-3) 2002 For N Uts. Property Clause 4.6 Of Table '8' For Bolt And Property Clause 4 Of Table '8' For Nut. [ Warranty Pe Riod: 30 Months After The Date Of Delivery ] ]