rate contract for supply of flange / bush ( 04 types ) for 18 months. , rate contract for supply of flange / bush ( 04 types ) for 18 months. , bottom flange ( pvn 12b ) ( fully finished ) to drg no. 25217001581-001, rev.05 ( sheet 01 ) . pvc factor of steel is 1:5.67. base rate of plates 25mm ( sl. no. 22 ) issued by jpc is rs 70.80 / kg. each bottom flange to be packed in thick polythene bag & then in corrugated packing. , bottom flange ( pvti ) to drg no. 25191000500-001, rev01, finish zinc plated as per drawing. pvc factor of steel is 1:14. base rate of plates 25mm ( sl. no. 22 ) issued by jpc is rs 70.80 / kg. , bottom guide bush ( steel ) to drg no. 45217001742 - 001, rev.07. pvc factor of steel is 1:0.5828. base rate of rounds 25mm ( sl. no. 9 ) issued by jpc is rs 60.30 / kg. , bottom flange to drg. no. 25213030543-001 rev.-09, ( sheet 1 ) . on fully finished basis. pvc factor of steel is 1:10.92. base rate of plates 25mm ( sl. no. 22 ) issued by jpc is rs 70.80 / kg.