Spring Center Tie Bolt w/ Hex Nut For Tie Bolt, 5/16-24

A spring center tie bolt with a hex nut (5/16-24 thread) is a fastening component used to clamp and secure parts of a leaf spring assembly, most commonly in vehicle suspension systems.

What it is

• Tie bolt (center bolt): A long, threaded bolt that runs through the center of a stack of leaf springs.
• Hex nut: Screws onto the threaded end to tighten and hold the assembly together.
• 5/16-24: Refers to the bolt size and thread pitch:
  • 5/16 inch diameter
  • 24 threads per inch (fine thread)

Main function

The tie bolt’s primary job is to:

• Hold the individual leaf springs tightly together so they act as a single unit.
• Maintain proper alignment of the spring leaves.
• Locate the spring pack on the axle — the bolt head often fits into a locating hole or bracket on the axle perch, ensuring the axle stays correctly positioned.