supply of procurement of semi permanent coupler end- a for schaku coupler of emu coaches etcprocurement of semi permanent coupler end- a for schaku coupler of emu coaches etc,semi permanent coupler end- a for schaku coupler of emu coaches to (i) m/s escorts drg .no 40586-(0) except bearing bracket with supports to drg no.40-588-07(2) (ii) m/s wsfs drg.no.40-586-a (0) except bearing bracket with supports to drg no.40-588-07(2) (iii) m/s sanroks dr g no.2ed-181-1355.or similar rdso approved drawing and rdsos spec.no.61-b-36 rev.68-1 with a mendment no.1 of october -2016. [ warranty period: 30 months after the date of delivery ] ]