... head screw spikes, timber drive spikes, T-bolts, fish bolts, switch & crossing bolts, high tensile strength bolts for rail bridges etc.3, Various type ... level was 10.9, 12.9 grade steel bolts. Steel bolts for the main power system, the machinery industry, the ... H.D.GPackingCarton, Box, Bag, PalletQuality AssuranceISO 9001Our bolts and assembly products are used by a wide variety of individuals and ...