Dexter APUBR‑9 U‑Bolt Kit – For 3″ Round Axles, 5,200‑7,000 lb Capacity

Ensure a secure and reliable suspension setup with the Dexter APUBR‑9 U‑Bolt Kit, designed to mount leaf springs to 3″ round axles rated between 5,200 and 7,000 lbs. This all‑inclusive kit offers durable hardware engineered to keep your axle aligned and stable under heavy loads.

Key Features:

• OEM Dexter Part #: APUBR‑9
  Manufactured to Dexter’s exacting standards. 

• Made for 3″ Round Axles
  Ideal for standard trailer axle tubes of this diameter. 

• 5,200–7,000 lb Suspension Capacity
  Compatible with medium to heavy trailer axles in that range. 

• Complete Hardware Kit
  Includes U‑bolts, plates, and nuts for a full install. 

• Robust Construction & Fit
  9/16"‑18 rod diameter and heavy steel build for dependable strength. 

Specifications:

• Part Number: APUBR‑9

• Kit Type: U‑Bolt Mounting Kit

• Intended Suspension Capacity: 5,200 lb to 7,000 lb

• Axle Tube Size: 3″ (round)

• U‑Bolt Rod Diameter: 9/16"‑18

• U‑Bolt Leg Length: 7¼″ (7.25") 

• Kit Includes:
    – 4 × U‑bolts (7¼" long)
    – 2 × U‑bolt plates (for 1¾" or 2" springs)
    – 8 × 9/16"‑18 hex nuts 

• Hardware Finish: Plain (uncoated) 

Application / Compatibility

The APUBR‑9 U‑Bolt Kit is appropriate for use with:

• Utility trailers

• Cargo / enclosed trailers

• Equipment & work trailers

• RV trailers with 3″ axles

• Trailers with 5,200 to 7,000 lb axles

• Leaf spring suspensions using 1¾″ or 2″ springs

Alternate Item Numbers 

• 9100048
•  4201-HD
• D40-APUBR-9-PB