Hexagonal Head Bolts & Nuts Size: 20 X 100 Mm. Assembled Having (1) Product Gra De Ms Black To Is: 1363( Part-I)-2002 Property Class 4.6 For Bolt (2) Product Grade Ms Black T O Is: 1363 (Part-3)-2002 Property Class 5 For Nut. [ Warranty Period: 30 Months After The Date Of De Livery ] ]