... head screw spikes, timber drive spikes, T-bolts, fish bolts, switch & crossing bolts, high tensile strength bolts for rail bridges etc.3, Various type ... supplying all kinds of high quality products such as bolts, high strength bolts, screws, nuts, threaded rod, anchor bolt, nail, other off ... 3103.1-2002 - b + 2 p the rest of the general tolerance according to GB/T 1084 - m selection7-Size: as ...