3-1/2" U-Bolt Kit for 8,000 lbs Round Trailer Axles – 7-3/4" Long x 9/16"-18 Thread Diameter – Includes U-Bolts, Tie Plates, Hex Nuts

Mount your trailer’s 3-1/2" diameter round axle to the leaf springs easily and securely with this comprehensive U-Bolt Kit. Designed for trailers with axle load ratings up to 8,000 lbs, the kit features 7-3/4" long raw steel U-bolts with heavy-duty 9/16"-18 threaded ends for superior strength and tight fit. Included are matching tie plates, hex nuts, to ensure a wobble-free connection and stable suspension. Whether replacing rusted or damaged U-bolts or upgrading your trailer’s hardware, this kit provides all necessary components with precise part numbers for smooth installation and future replacements. Ideal for boat trailers, utility trailers, and heavy-duty hauling applications, this kit offers dependable performance and peace of mind for any trailer owner.

• Fits 3-1/2" Round Axles — Designed specifically to mount 2" wide leaf springs onto trailers with 3.5" round axle beams supporting up to 8,000 lbs.
• Complete U-Bolt Kit — Includes 4 raw U-bolts (#4200-1), 2 tie plates (#4200-3), and 8 hex nuts (#4203-2) for a secure and reliable assembly.
• Durable & Heavy-Duty Components — Raw steel U-bolts with precision-cut 9/16"-18 threads deliver excellent strength and secure fit for heavy trailer loads.
• Easy Installation — One kit covers a single axle for quick replacement of worn or damaged U-bolts, improving suspension stability and safety.
• Trusted Part Numbers Included — Full set with part numbers APUBR-35, #4200-1, #4200-3, #4203-2, and #4203-4 for hassle-free ordering and identification.