supply of secondary spring ( outer ) for generator car side 1. rdso specification no. rdso / 2017 / cg-01 ( rev-01 ) , special condition: ( i ) guarantee 06 years from the date of delivery or 05 years from the date of actual fitment whichever is earlier. ( ii ) the material to be used in the manufacture of springs and the finished springs shall be subjected to inspection by the rdso inspector. ( iii ) steel round for hot coiled cylindrical spring for use in suspension of indian railway coaches having fiat design bogies ( rdso specification no. rdso / 2017 / cg-01 rev-01 ) is to be procured by the spring manufacturers from rdso vendors for developmental orders for spring steel round for hot coiled cylindrical spring as per drg.no. drawing no.1277146 ( side-1 ) specn: 17.248 100 05& 17.471 101 01 alongwith design letter no.md23151 dt:31.03.2015 and mcf designs letter no. rbl-md44123, dated 06.09.2018 & except clause 8.1 to 8.4 of annexure-a. and mmdts-18015, rev-01. [ warranty period: 30 months after the date of delivery ] => limited