... Size:M12-M36 Material:Carbon Steel,Alloy Steel1, Elastic rail clips2, Dog spikes, square head screw spikes, timber drive ... switch & crossing bolts, high tensile strength bolts for rail bridges etc.3, Various type and sizes of tie ... pads, fish plates and joint bars.4, Rail brace, welded shoulders and rail anchors.5, Standard fasteners.6, Nuts, flat ... High Strength Bolt for railway,subway or bridge