Feature: 1. Heat Treatment: Made of heat treated steel, the bolts have a strong oxide film on the surface, which enhances their anti wear and erosion quality and prolongs their service life. 2. High Strength: Bolts with 18 threads per inch, deep and clear. Heat treated bolt has a higher strength and hardness, anti tensile and torsion, not easy to deform or break under high loads. 3. Application: These trailer leaf spring shackle bolts are used to fix your leaf springs to the leaf spring hangers and also to the center equalizer bar of the trailer. 4. Wide Compatibility: The leaf spring shackle bolt set is suitable for use with trailers that have 2,000lb and 3,500lb axles, versatile use with wide compatibility. 5. Package Include: You will receive 4pcs leaf spring shackle bolt with matching lock nuts, providing a complete solution for your trailer attachment needs. Specification: Item Type: Trailer Leaf Spring Shackle Bolts Material: Steel Fitment: Fits for installing 1-3/4in wide leaf spring and double eye leaf springs onto hanger bracket or equalizers. It is common on trailers that have a 2,000lb and 3,500lb axles.. Package List: 4 x Leaf Spring Shackle Bolts 4 x Nut