Rail special bolt and nut
Rail-specific bolts and nuts are designed to securely fasten rails to sleepers or concrete foundations. They are typically made from carbon steel with surface hardness of 300–400 HB and tensile strength of 800–1000 MPa. Bolt diameters range from M16 to M36, with lengths from 60 to 250 mm. Threads are precision-made according to ISO or DIN standards, providing high shear and tensile load capacity. Surface treatment with hot-dip galvanization or epoxy coating enhances corrosion and wear resistance in railway environments.
Nuts are paired with flat, spring, or rubber washers to reduce vibration and loosening during train operation. The geometry ensures uniform transfer of axial and radial loads along the rail. Suitable for urban, industrial, freight, and passenger railway lines, these fasteners allow quick and safe installation. High mechanical strength increases rail durability and reduces maintenance costs.
