supply of semi permanent coupler end a conforming to rdso specification no. 61- b - 36, rev. 68-1 with amendment no. 1 of october 2016 and to m/s. escorts make drawing. no.sk-750 consisting of 5 items: 1) intermediate tube to escorts drg.no. sk-754. 2) air p ipe coupling (complete) to escorts drg.no. sk.198. 3) draw and buff gear to escorts drg.no. sk-752 4) adjustable cup sleeve to escorts drg.no. sk-755 5). centering device (sub-assembly) to escorts drg.no. sk-756 or m/s.wsf make or m/s sanrok enterprises make to their equivalent drawing for emu/memu application. [ warranty period: 30 months after the date of delivery ] amm/tsd/avd, sr tamil nadu 17.00 numbers