supply of design manufacture and supply of high tensile aar h type tight lock centre buffer coupler etc.design manufacture and supply of high tensile aar h type tight lock centre buffer coupler etc.,design manufacture and supply of high tensile aar h type tight lock centre buf fer coupler head with transition screw coupling and its associated components for fitmen t on broad gauge passenger coaches of indian railways as per rdso.specn.no. rdso/2009/cg- 22, rev -01 or latest. one coupler set shall consists of the following 1.tight lock coupler head with transition screw coupling and its associated components 1 no rdso approved fir m drgs.(note : a. the silentblock shall be of make gmt or tvs only with prominent marking f or easy identification as per rdso letter no.mc/blb/cbc dt. 31.08.2024 or latest, b. the locking pin assembly shall be as per rdso drawing no.rdso/cg/drg/24003 or latest ) 2. balan ced draft gear with pivot pin 1 no rdso approved firm drgs as per rdso/2011/cg-03 (rev.-3) a mendment -1 or latest. 3.supporting device for coupler head with m20 fasteners 1 no rdso a pproved firm drgs. 4.manual uncoupling device with m12 fasteners 1 no rdso approved firm drgs. 5.rear carrier plate for draft gear with m16 fasteners 1 no rdso approved firm drgs. 6.front carrier plate for draft gear with m16 fasteners 1 no rdso approved firm drgs. (no te: the stiffener plate shall be of grade is: 3885 part 2 grade 5 with hardness 245 bhn (max.) and as per rdso drawing no. rdso/cg/drg/24034 alt-1 and rdso letter no.mc/blb/cbc dt. 24.0 4.2025 or latest). [ warranty period: 84 months after the date of delivery ] ]