Size Indication: The first image shows “24mm,” which likely refers to the bolt diameter.
Material: Typically made from forged carbon steel or alloy steel, coated or blackened to resist corrosion.
Function:
These bolts are used to secure fish plates (joint bars), which connect two railway rails together.
The hammer head locks into a groove or slot in the rail or base plate, allowing the bolt to stay in position while a nut is tightened on the opposite side.
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