Set Of Hardware Set Consisting Of 3 Items Required For Fixing Roof Bars & Couplers As Follows. 1) Set Of Hex Head Bolt Full Threaded Size: M6 X 20Mm, Pitch : 1.0Mm, Grade : 8.8 As Per Is: 1364(Part-2) Along With Suitable Four M6 Nuts, Grade: 8.0 As Per Is: 1364(Part-3), Four Flat Washers As Per Is: 2016 And Four Spring Washers As Per Is: 3063. Qty/Set. = 01 Set. 2) Set Of Hex Head Bolt Full Threaded Size: M8 X 40Mm, Pitch : 1.0Mm, Grade: 8.8 As Per Is: 1364(Part-2) Along With Suitable Four M8