... , timber drive spikes, T-bolts, fish bolts, switch & crossing bolts, high tensile strength bolts for rail ... bridges etc.3, Various type and sizes of tie plates, clamps, fastenings, ... S. I ( 120 Kg /mm 2 ) Elastic Load Limit: 140.000 P. S. I ( 100 Kg /mm ... 4'' 5.High tensile Description(TC bolt) Torshear type high strength bolts for steel structureMaterialAlloy steel ,carbon ...