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 suitable two M12 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 for DBR assembling with MVRF. Qty/ set. = 02 sets. Makes: TVS/ LPS/ Unbrako/ BMI/ DFL. Note: 1 ) One sample set should be got approved before effecting bulk supply. 2 ) Firm must mention the specific make of the offered material while participating in the tender, otherwise such offers are liable for rejection.