Set of two different items required for maintenance of AC electric locomotives as follows. 1 ) Set of Hex. Head Bolt Size: M10 x 55 mm Phosphate ( black ) coated and Half threaded as per IS: 1364 part- 2, grade: 8. 8, along with suitable one M10 Nut as per IS: 1364 part- 3, grade: 8. 0, two flat washers as per IS: 2016 and two spring washers as per IS: 3063 for Reverser/ CTF. Qty/ set = 01 set. ( 2 ) Socket head cap screw ( Allen screw ) full threaded Size: M6 x 20 mm, grade: 12. 9 as per IS: 2269 for CTF. Qty/ set = 03 Nos. Makes: TVS/ LPS/ Unbrako/ BMI/ DFL or its equivalent.