supply of 6400mm over riding derailing switch, fabrication & supply of 6400 mm over riding derailing switches 1 in 8.5 t / out for bg ( 1673mm ) 52kg on psc sleepers to rdso drg. no. t-5836 alt.3 with latest alteration and conforming to specification no. irs: t-10-2000 with corrigendum 01 dec 2016 with latest corrigendum issued up to the actual date of closing tender complete with stock rails and all parts & fittings as listed in the drawing but excluding grooved rubber sole plates, insulating lines, elastic rail clips, plate screw, fish plates and fish bolts. [ warranty period: 30 months after the date of delivery ]