The Seachoice Shackle Bolt 9/16" with Nut (2-Pack) is a heavy-duty hardware solution engineered to securely mount double-eye leaf springs to the hangers or equalizers on your trailer suspension system. Forged from high-strength steel with a protective zinc finish to resist rust and road wear, these 9/16"-18 x 3" bolts feature a splined shoulder design that bites into the hanger bracket to prevent the bolt from rotating and wearing down the bracket over time. Providing a complete and reliable replacement for one side of your axle suspension, this convenient two-pack comes complete with matching locknuts to ensure a safe, vibration-resistant fit that keeps your trailer running smoothly.