Manufacture and supply of Hook bolts & nuts of size 22 x 400 mm with nuts, single coil spring washers and split pin of 4mm dia for steel channel sleepers confirming to RDSO Drg No. B- 1636/ 1 with latest alterations as on opening of tender and conforming to Specification IS- 2062- 2006, E250 Gr- A for hook bolts, specification IS: 3063- 1972 for spring washer and specification IS: 549 for split pin with latest alterations, If any as on opening of tender.