supply and transportation of rubber insertion, impeller shaft, nut and bolt and gland packing required for maintenance of different major rli schemes under balurghat-i (a.m) sub-division- 1 supply and transportation of rubber insertion 5 mm thick with proper reinforcement 2 ply to i.s.638/79 with latest amendments duly isi marked suitable for m.s.flange as per i.s.6392/71 with standard drilled holes.(table17) i) 150 mm dia (table-17) 2 20 hp pump impellar shaftfor venus/ kirloskar water pump with key(ss410 required) 3 3/8x 3 1/2 ms foot valve nut bolt conforming to is 1363 part-i & iii/1992 of product grade c) 4 3/4gland packing constructed from high tensile strength ptef [graphited natural fiber packing, impregnated with lubricants and graphite].shall conform to is: 4687/1995.make: champion (model no.3116/2222/2224/6100)/hindustan composites ltd. 5 1/4gland packing constructed from high tensile strength ptef [graphited natural fiber packing, impregnated with lubricants and graphite].shall conform to is: 4687/1995.make: champion (model no.3116/2222/2224/6100)/hindustan composites ltd.