supply of coupling, leather washer etc. required for maintenance of different rli scheme under bishnupur ( a-m ) sub-division under bankura ( a-m ) division. under np / mtn programme 2022-23 , star type ci coupling for 150x150 nb water pump 20 hp ( 10.2 kg per pair ) , foot valveleather washer 150 mm dia ( imperial make ) , rubber insertion dia 150 mm x 5 mm thick with hole ( t-17 ) , ball bearing 6307 ( skf make ) , gland packing 10 sq mm ( graphite natural fibre packing, champion make , champion style no. 3116 ) , m.s heavy duty hose clamp 150 mm dia 2 mm thk 45 mm width fitted with bolt , nuts & washer complete , c.i top cover plate for 6 alfa alfa valve ( screw type ) ( as per sample )