supply of improved high tensile tight lockimproved high tensile tight lock,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 (re v.-3) consisting of 6 items, (sr. no. 1) tight lock coupler head aar-h type with main pin. qty. 1 no., (sr. no . 2) balance draft gear. qty. 1 no. (sr. no. 3) supporting device with fasteners. qty. 1 no. (sr. no. 4) manua l uncoupling device with fastners. qty. 1 no. (sr. no. 5) base plate with fasteners. qty. 1 no. and (sr. no. 6) support plate with fasteners. qty. 1 no. material & specification as per rdso/2011/ cg-03 (rev.-3) [ warra nty period: 84 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] senior section engineer gujarat 120.00 set