1/2" Trailer U-bolt kit for 3" Tube 5200 - 7000 lb Axles

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1/2" Trailer U-bolt kit for 3" Tube 5200 - 7000 lb Axles

1/2" Trailer U-bolt kit for 3" Tube 5200 - 7000 lb Axles

SKU : 5207UBKT1/2-360

Online price only

Regular price $5,294.99

Online price only

SAVE 0% (833) 910-3416
4.1
Rated 4.1 out of 5 stars
28 Reviews
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5.2K–7K Trailer U-Bolt Kit — 3" Axle Fit | 7" U-Bolts | Complete Mounting Kit

Secure your trailer’s suspension with this complete 5.2K–7K U-bolt kit. Designed to mount leaf springs to a 3" round axle, this kit includes all the essential hardware needed for a reliable and stable installation. Whether you're building a new trailer or repairing an existing one, this kit ensures your suspension system is properly secured.

U-Bolt Kit Specifications

  • Axle capacity: 5,200–7,000 lbs
  • Axle size: Fits 3" round axle
  • U-bolt length (L): 7"
  • U-bolt width (A): 3"
  • Diameter (D): 1/2"
  • Plate compatibility: 1-3/4" or 2" springs

What’s Included

  • (4) 7" long U-bolts
  • (2) U-bolt plates for 1-3/4" or 2" springs
  • (8) 1/2"-20 hex nuts

Key Benefits

  • Complete kit includes all hardware needed for installation
  • Designed for secure mounting of leaf springs to axle
  • Heavy-duty construction for long-lasting durability
  • Fits most 5.2K to 7K trailer axle setups
  • Ideal for both new builds and suspension repairs

Installation Notes

Spring seats are required to mount the axle to the leaf springs and are sold separately.

When ordering raw steel components, minor surface oil or light rust may be present from transit or handling. Clean and coat if needed before installation.

Ideal For

  • Utility trailers
  • Cargo trailers
  • Equipment trailers
  • Flatbed trailers
  • Trailer suspension repairs and builds

Why Buy from The Trailer Parts Outlet?

  • Fast shipping
  • Bulk and wholesale options available
  • High-quality trailer suspension components
  • Expert support to help you choose the right parts

Order your 5.2K–7K trailer U-bolt kit today and secure your trailer suspension with confidence.

4.1
Rated 4.1 out of 5 stars
Based on 28 reviews
Total 5 star reviews: 21 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 1 Total 1 star reviews: 5
Customers Talked About
28 reviews
  • DW
    David W. B.
    Verified Buyer
    21 seconds ago
    Rated 5 out of 5 stars
    6,000 pound trailer axle an u-bolt kit.

    The axle and u-bolt kit arrived on time and was exactly what I ordered.

  • KL
    kent l.
    Verified Buyer
    1 month ago
    Rated 5 out of 5 stars
    As advertised

    Fit perfectly.

  • KS
    Kent S.
    Verified Buyer
    1 month ago
    Rated 5 out of 5 stars
    U bolts

    Well, they went around a new axles as ordered.

  • DM
    Daniel M.
    Verified Buyer
    1 month ago
    Rated 5 out of 5 stars
    Axle upgrade

    Worked great. Fast shipping

    The Trailer Parts Outlet
    1 month ago

    Great to hear the 1/2" Trailer U-bolt kit worked perfectly for your axle upgrade and that the shipping was fast, Daniel! We're thrilled you're happy with your purchase. Thank you for your business and your 5 star review!

    Lindsey Millican
    (936) 935-2186
    The Trailer Parts Outlet

  • CC
    Chad C.
    Verified Buyer
    2 months ago
    Rated 5 out of 5 stars
    New bolt kit.

    I have been busy swapping a set of axles from off of an older damaged trailer, and onto a new build. This new U-bolt kit worked flawlessly and fit correctly, unlike the u-bolts I picked up from a local bolt supply store.

    The Trailer Parts Outlet
    2 months ago

    Great to hear the U-bolt kit worked flawlessly for your axle swap project, Chad! We're glad it fit correctly and performed better than what you found locally. Thank you for your business and your 5 star review!

    Anna Nicholas
    (936) 935-2186
    The Trailer Parts Outlet