supply of hinged cover for --- coupling socket & blind socket assembly of inter vehicular coupler 500 s for lhb ac coaches , hinged cover for coupling socket assembly of inter vehicular coupler 500amps for lhb ac co aches as per drg.no.lw71309 conforming to rdso specification no.rdso/pe/spec/ac/0177-2013 (rev.0) or latest. [ warranty period: 30 months after the date of delivery ] ] , hinged cover for blind socket assembly of inter vehicular coupler 500 amps for lhb coaches conforming to rdso specification no. rdso / pe / spec / ac / 0177- 2013 (rev.1) with rcf drawing no.lw7 1342. [ warranty period: 30 months after the date of delivery ] ] , complete conduit seal ring for jumper plug assembly for high capacity ivc unit 5 00a 750v rating for eog type ac coaches / power cars confirming as per rdso specification no. pe/s pec/ac/0177 (rev.0) -2013 or latest. [ warranty period: 30 months after the date of delivery ] ]