tender for supply of miscellaneous materials for maintenance of different r.l.i schemes under kalyani (agri-mechanical) division , kalyani,nadia---1 supply of ball bearing 6307 ( tata /hmt/skf make) 2 supply of c.i. wedge for 150 mm nominal size sluice valve. (as per sample provided). 3 supply of nuts & bolts : g.i. hexagonal head bolt and nuts bearing is:1363 (part-i)/1992 of product grade -c with latest amendments for bolts & is-1363 (part-3)/1992 of product grade c with latest amendments for nuts properties/ clause for bolts- 4.6 & for nuts- 4.5. both bolts & nuts are to be duly isi certification marked with 2 nos plain ms washer.m 16x 80 mm [number of bolt in 50 kg = 242 nos] 4 m 12x 80 mm [number of bolt in 50 kg = 440 nos]