High tensile hex. head bolt M 16 x 55mm property class 10. 9 as per IS: 1364 ( part ) 1992. MAKE: TVS/ UNBRAKO/ LPS and all approved vendors for axle end steel high tensile cap screws ( to be used in end holes of BG freight axles ) brone on the RDSO vendor list QM- M- 8. 1- 1 to RDSO letter no. MC/ CTRB/ Genl. dated 21- 04- 2021 specn: Make/ Brand- UNBRAKO/ LPS/ TVS and all Approved vendors for axle and steel high tensile cap screws ( to be used in end holes of BG freight axles ) brone on the RDSO vendor list QM- M- 8. 1- 1 to RDSO letter No. MC/ CTRB/ Genl. Dated21. 04. 2021