Cast Steel Wedge ( for nested spring ) fo [ Cast Steel Wedge ( for nested spring ) for LWLH Bogie. Drawing No.: RDSO s Drg. No. WD- 13012- S/ 06, Alt. Nil, Item No. 1. Material and Specification: As per Drawing and conforming to RDSO s Spec. No. WD- 40- LWLH25 Bogie (