supply of uncoupling deviceuncoupling device,manual uncoupling device assembly (for high tensile tight lock centre buffer cou pler with aar h - type head and balanced draft gear) to escort part no.sk466 and confirming t o rdso specification no. rdso/2011/cg-03 (rev-1). make - escorts. [ warranty period: 30 months afte r the date of delivery ] ] , support pin for main pin for knuckle as per escorts drg no: sk 576 conforming t o rdso spec. rdso/2011/cg-03 rev-03., [ warranty period: 30 months after the date of delivery ] ] , lock to escorts drawing no. sk 612 conforming to rdso specification rdso/2011/cg-03 rev -03 . the material should be supplied with guarantee / warranty certificate and work test certificate [ wa rranty period: 30 months after the date of delivery ] ] , main pin for knuckle (escorts make) as per escorts part no. sk 575 conforming to rdso speci fication rdso/2011/cg-03, rev -03. [ warranty period: 30 months after the date of delivery ] ]