... High-Strength Bolt&Nut for Track Shoe/Roller/Segment/Sprocket 1.Materials: low carbon alloy steel ... spikes, timber drive spikes, T-bolts, fish bolts, switch & crossing bolts, high tensile strength bolts for rail bridges etc.3, ... supplying all kinds of high quality products such as bolts, high strength bolts, screws, nuts, threaded rod, anchor bolt, ... Bolt&Nut for Track Shoe/Roller/Segment/Sprocket