... bolts, fish bolts, switch & crossing bolts, high tensile strength bolts for rail bridges etc.3, Various type and ... and nuts:Mechanical Properties1, Material: 40 Cr.2, Tensile strength: Mpa quartile 1220 (magnitude 12.9) .3, Tension ... '' 5.High tensile Description(TC bolt) Torshear type high strength bolts for steel structureMaterialAlloy steel ,carbon steel, stainless steel etc.SizeM16-M30Length40mm ...