supply of blind socket assembly with locking arrangement suitable for inter vehicular coupler (500a, 750v) for lhb coachesblind socket assembly with locking arrangement suitable for inter vehicular coupler (500a, 750v) for lhb coaches,blind socket assembly with locking arrangement suitable for inter vehicular coupler (50 0a, 750v) for lhb coaches as per rcf drg. no. lw71302, alt.nil conforming to rdso specification no . rdso/pe/spec/ac/0177-2013 (rev. 1). [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]