Bush for Equalising Stay for lower spring beam ( 16. 25 T axle ), Size: OD 42 ( + 0. 35/ + 0. 15 ) mm X ID 32 ( + 0. 2/- 0. 1 ) mm X Length 32 ( + 0. 0/- 0. 5 ) mm. Drawing No.: RDSO ' s Drg. No. SKETCH- 81039, Alt. 15, Item No. 3. Material and Specification: ( i ) HPPA to RDSO ' s Spec. No. RDSO/ 2009/ CG- 17 ( Rev. 3/ April 2023 ) OR ( ii ) SLPR to RDSO ' s Spec. No. C- K605 ( Rev. 3/ April 2023 ).