supply of rachet assembly for zs coupling ( blind socket/coupling socket assembly) as per rcf drawing no.lw71330 alt a and conforming to rdso specrachet assembly for zs coupling ( blind socket/coupling socket assembly) as per rcf drawing no.lw71330 alt a and conforming to rdso spec,rachet assembly for zs coupling ( blind socket/coupling socket assembly) as per rcf drawing no.lw713 30 alt a and conforming to rdso spec. no. rdso/pe/spec/ac/0177-2013, rev-1, note:- material to be procured from ra ilway approved sources of zs coupling (400/500,750 v). [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] => limited