supply of silico-manganese steel liner for brake beam of casnub 22 hs/nl bogie. spec. no.wd-17-casnub-22hs-bogie-92 rev.3, with 6 amendments , silico-manganese steel liner for brake beam of casnub 22 hs/nl bogie. spec. no.wd- 17-casnub-22hs-bogie-92 rev.3, with 6 amendments: (last amendment no. 6 issued in july20.),wd- 21-casnub-22nlb bogie-93 rev.2 with 6 amendments: (last amend. no. 6 issued in july20) as per d rg. no. rdsos wd-89033-s/1 alt.25 or latest, item no. 08, spec: wd-17-casnub-22hs-bogie-92 rev. 3 and wd-21-casnub-22nlb bogie-93 rev.2 with 6 amendments: last july 20. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]