... bolts, 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, ... 2008. 4.Also can manufacture by requirement. Steel structure hexagon head bolts TypeGradeMaterialSpecificationHardnessBolt10.9S20MnTiBM12-M30HRC33-3935VB8.8S40BHRC24-3145 ...