Tenders for Procurement Of Hexagonal Head Bolts And Nut Size: 12 Mm X 50 Mm Length, Property Class Of Bolt Is 4.6 As Per Is: 1363 Part-1 2002, Property Class Of Nut Is 5 As Per Is: 1363 Part- 3 2002. Warranty Period: 30 Months After The Date Of Delivery