... drive spikes, T-bolts, fish bolts, switch & crossing bolts, high tensile strength bolts for rail bridges etc.3, Various type and sizes ... ,12.Bolts and nuts:Mechanical Properties1, Material: 40 Cr.2, Tensile strength: Mpa quartile 1220 (magnitude 12.9) .3, Tension loading: N ... .3.7Product name: Track bolt and nut Model: As per machine Material: 40Cr Processing: Forging Size: M12*40 19/40-1 ...