procurement of c.i. tail piece, nut and bolt, flanged coupling, foot valve leather washer, red paper and hose clamp required for maintenance of different major rli schemes under balurghat-i (a.m) sub-division- 1 150 mm dia.c.i flanged tail piece one end flanged(23 mm thickness) drilled as per is 6392 (tablr-17) and other end grooved. overall length (175+ 15) mm with 7 nos groove. material shall be c.i. conforming to grade f.g-200 of is:210. one coat black japan ( type b) conforming to is:341/1973. casting shall be l 12.5 micron surface 2 gi 5/8 x 2 1/2 ms nut and bolt as per is 1363 part-i & iii /1992 of product grade c 3 flanged coupling (ms iron coupling with nut bolt, od for flange-160 mm, width 50 mm and pcd-110mm, id for hub -42 mm and od -68mm key slot-50 mmx12mmx6mm for driving side and id for hub -28mm and od-60mm, key slot- 50mm x 8mmx4mm for driven side) including rubber belt, nut & bolt 4 150 mm dia foot valve leather washer best quality brand (imperal/techno/burhani) 5 red paper, a0 size 200gsm 6 150 mm dia m.sheavy duty hose clamp (with nut & bolt attachment)