supply of improved 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 ........improved 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 ........,improved high tensile tight lock center buffer coupler with aar h type head and balan ced 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) manua l uncoupling device qty. 01no. (sr. 5)base plate with fasteners qty. 01 no. and ( sr.6) support plate wi th fasteners qty. 01 nos. [ warranty period: 84 months after the date of delivery ] ]