supply of semi permanent couplersemi permanent coupler, semi permanent coupler end-a conforming to rdso specification no.61-b-36, rev 68-1 with amendment 1 of oct-2016 and to schaku drg no. 40.586 ( 0 ) consisting of 6 items: [ 1 ] intermediate tube to schaku drg no. 40.586.01.01 ( 2 ) [ 2 ] air pipe coupling ( complete ) . to schaku drg no. 40.587.04 ( 3 ) [ 3 ] draw and buff gear to schaku drg no. 40.586.06 ( 2 ) [ 4 ] bearing bracket with support to schaku drg no.40.588.07 ( 2 ) [ 5 ] adjustable cup sleeve to schaku drg no. 40.317.13 ( 2 ) [ 6 ] centring carrier ( sub assy ) to schaku drg no. 40.1000.10 ( 2 ) note: to be procured from rdso approved sources only. [ warranty period: 30 months after the date of delivery ] => limited