Hexagonal Head Bolts And Nuts Assembled Size 20 X 50 Mm(1) Product Grade C,Ms Black To Is: 1363 (Part- I)-2002,Property Class 4.6 For Bolt And (2) Product Grade C, Ms Black To Is: 1363 (Part- 3)-2002 Property Class 5 For Nut. [ Warranty Period: 30 Months A Fter The Date Of Delivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitt Ed: Max 8 Lacs ] ]