Procurement of Cut off angle cock with vent for air brake coaches to RDSO Drg, no. WD- 88123- S- 01 alt. 2 or latest and part RDSO Drg. no. WD- 88123- S- 02 alt- 6 or latest, fitted with reducing bush to ICF DRG no. EMU/ M- 3- 5- 053 Alt n/ 17 or latest item no. 7, conforming to RDSO Specn. No. 02- ABR- 02, Amnd. Slip no. 4 of Sept. 2016 or Latest appendix- D.