supply of improved high tensile tight lock centerimproved high tensile tight lock center,improved high tensile tight lock center buffer coupler with aar h type head and balanced draft gear for fitment on bg passenger coaches confirming to rdso specification no. rdso/2011/cg-03 (rev-03) consisting of 06 items. (sr.1): tight lock coupler head aaa-h type with main pin qty-01 no. (sr.2) balance draft gear qty. 01 no. (sr.3)supporting device with fasteners qty. 1 no. (sr.4) manual uncoupling device qty. 01no. (sr. 5) base plate with fasteners qty. 01 no. and ( sr.6) support plate with fasteners qty. 01 nos. [ warranty period: 84 months after the date of delivery ] , improved high tensile tight lock center buffer coupler with aar-h type head and balanced draft gear for fitment on bg passenger coaches confirming to rdso specification no. rdso/2011/cg-03 (rev.-3) consisting of 6 items:- 1. tight lock coupler head aar-h type with main pin. qty.-1 no., 2. balance draft gear. qty.-1 no., 3. supporting device with fasteners. qty.-1 no., 4. manual uncoupling device. qty.-1 no., 5. base plate with fasteners. qty.-1 no. and 6. support plate with fasteners. qty.-1 no. [ warranty period: 84 months after the date of delivery ]