Hexagonal Head Bolts And Nuts Of Size 20X90Mm. Note: Property Class For Bolts And Nut S: For Bolts As Per Is: 1363, Part-1/2002, Property Class Gr. 4.6 And For Nuts As Per Is: 1363, Part-Iii/20 02. Property Class Gr. 5 [ Warranty Period: 30 Months After The Date Of Delivery ] ]