supply of supply of set of items consiting of 1) lock as per escorts part no. sk 612 for aar- h type cbc as persupply of set of items consiting of 1) lock as per escorts part no. sk 612 for aar- h type cbc as per,supply of set of items consiting of 1) lock as per escorts part no. sk 612 for aar- h type cbc as per rdso spec. no. rdso/ 2011/ cg-03 (rev.1) or latest-01 no. 2) knuckle as per escorts part no. sk 611 for aar- h type cbc as per rdso spec. no. rdso/2011/cg-03 (rev.1) or latest-01 no. 3) knuckle thrower as per escorts part no. sk 1560 for aar- h type cbc as per rdso spec. no.rdso/2011/cg-03 (rev.1) or latest-01 no. 4) rotary lock lifter for aar-h type tight lock coupler head assembly (escorts make) for high tensile tight lock center buffer coupler with aar h type head and balanced draft gear to rdso specification no. rdso/2011/cg-03 (rev-3) or latest-01 no. [ warranty period: 30 months after the date of delivery ]