supply of high tensile aar h type tight lock couplerhigh tensile aar h type tight lock coupler,high tensile aar h type tight lock coupler with transition screw coupling and its associated components for fitment on bg p assenger coaches of indian railways to rdso specification no. rdso/2009/cg-22, rev.1 and also confirming to rdso specification no. rds o/2011/cg-03, rev.3. one coupler set shall consist of the following. 1. tight lock coupler head with transition screw coupling and its assoc iated components -01 no. 2. balanced draft gear with pivot pin-01 no. 3. supporting device for coupler head with fasteners-01 no. 4. manu al coupling device with fasteners-01 no. 5. rear carrier plate for draft gear with fasteners-01 no. 6. front carrier plate for draft gear with fasteners-01 no. [ warranty period: 30 months after the date of delivery ] ]