Set Of Hex Head Bolts Of Two Different Sizes Required For Maintenance Of Ac Electric Locomotives As Follows. 1) Set Of Hex. Head Bolt(phosphate Coated) Size: M10 X 45 X 1.50 Mm Full Threaded As Per Is: 1364 Part 2, Grade: 8.8, Along With Suitable Three Flat Washers As Per Is: 2016 And Three Spring Washers As Per Is: 3063 For Fixing Of Line Contactors. Qty/Set. = 01 Set. 2) Set Of Hex Head Bolt(zinc Coated) Size: M12 X 50 X 1.75 Mm Full Threaded Grade: 8.8 As Per Is: 1364(part 2) Along With S