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U-Bolt Plate for 4" Diameter, Round Trailer Axles with 2" Wide Springs
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Dexter

U-Bolt Plate for 4" Diameter, Round Trailer Axles with 2" Wide Springs

Part Number: 12-42
In Stock
$23.59
Trailer Suspension Parts
U-Bolt Plate for 4" Diameter, Round Trailer Axles with 2" Wide Springs 5/8 Inch Diameter 12-42
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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Plate uses 5/8" diameter U-bolts to attach your round, 4" diameter trailer axle to your 2" wide leaf springs. Designed for use with 9,000-lb Dexter axles. Great Prices for the best trailer suspension parts from Dexter. U-Bolt Plate for 4" Diameter, Round Trailer Axles with 2" Wide Springs part number 12-42 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (11)
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Dexter Trailer Suspension Parts - 12-42

Highlights

  • Fits 4" Round Axles: Secures the axle tightly to keep the trailer tracking straight.
  • For 2" Wide Springs: Matches common spring widths for solid, balanced support.
  • Handles 9,000 lbs: Built for heavy-duty Dexter axle setups that carry big loads.
  • Uses 5/8" U-Bolts: Clamps the axle firmly to prevent shifting or looseness.
  • 0.31" Thick Plate: Strong steel plate resists bending under heavy suspension stress.
  • Works with U-Bolt #11-64: Pairs with matching hardware for a complete install.

Features to know about

Keeps the Axle Tight and Secure: 0.31" Thick Steel Plate Holds Strong

When the connection between the axle and springs loosens, it can throw off alignment and stability. This 0.31" thick steel plate locks everything in place with strength you can count on. It’s made to pair with two 5/8" diameter round U-bolts (sold separately) to clamp the axle tight so the suspension works the way it should mile after mile.

Built for Heavy-Duty Performance: Made for 9,000-lb Dexter Axles

Heavy loads demand solid hardware. This plate is designed specifically for 9,000-lb Dexter axles, giving it the toughness needed for serious hauling. Whether you’re towing gear or cargo, it keeps the axle firmly mounted to handle the weight without flexing or shifting.

Right Fit for Common Setups: Works with 4" Round Axles and 2" Wide Springs

You don’t need to guess if it fits. This U-bolt plate is made for round 4" diameter trailer axles and 2" wide leaf springs, so everything lines up cleanly. The geometry is dialed in for a snug fit that restores proper suspension alignment and keeps your setup running smooth.

Reliable Connection Every Time: Pairs with U-Bolt w/ Locknuts #11-64

Matching the right parts matters for strength and safety. This plate works with the U-Bolt w/ Locknuts #11-64 to form a dependable clamp around the axle and springs. Together, they create a solid link between the axle and frame that stays tight through bumps, turns, and long hauls.

Specs

Compatibility

  • Axle type: Round trailer axle
  • Axle diameter: 4"
  • Spring width: 2"
  • Axle rating: 9,000-lb Dexter axles

Hardware Specifications

  • U-bolt diameter: 5/8"
  • Number of U-bolts required: (2) 5/8" diameter, round U-bolts (sold separately)
  • Plate thickness: 0.31"
  • Compatible U-bolt and locknuts: #11-64

12-42 U-Bolt Round Axle Plate - 2" Springs - 4" Diameter Axle





Video of U-Bolt Plate for 4" Diameter, Round Trailer Axles with 2" Wide Springs
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for What to Know About the U-Bolt Plate for 4" Diameter, Round Trailer Axles with 2" Wide Springs

Speaker 1: Today we're taking a look at a U-bolt plate. Now, this plate is used with U-bolts to secure an axle to leaf springs, which are mounted to the trailer frame. This attaches with two 5/8 inch diameter round U-bolts. U-bolts are sold separately and available at etrailer.com. It fits round trailer axles with a 4 inch diameter. We can tell that by simply taking the measurement between our holes edge to edge and that gives us that 4 inch span.

It's designed for use with 9,000 pound dexter axles. Works with 2 inch wide leaf springs. It's made form a durable steel construction and already has the necessary holes pre-made into the plate. Taking a look at the overall measurements of the unit real quick, going edge to edge it gives us a measurement of 7-3/4 inches. Edge to edge going this direction, it gives us a measurement of 4-1/2 inches.

That's going to do it for today's look at the U-bolt plate.

Customer Satisfaction Score:

Ratings & Reviews

4.7

11 reviews
Review sort icon
Plate uses 5/8" diameter U-bolts to attach your round, 4" diameter trailer axle to your 2" wide leaf springs. Designed for use with 9,000-lb Dexter axles.

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Prompt delivery - earlier than expected.
Quality
product - well packaged.
Product as advertised.



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Worked good had to put in drill press to oval the holes a touch so the u bolts would be straight



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The customer service was outstanding. Thru the process of identifying what I needed to ordering and delivering the products I dealt with multiple Customer Service Representatives (CSR). Everyone of them were helpful and courteous. I really appreciated the follow up after my initial contact with CSR. Once the product was ordered I was kept up to date on the status of the order thru regular emails from an etrailer CSR. The parts arrived as they promised, and a CSR even followed up with me after that. Great service, keep it up!



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Other than the parts taking a month to process, once they were gathered and packaged, they were delivered within 2 days! I replaced both sides with new 3-leaf double eye springs, 4 shackle straps, 6 shackle bolts, 2 Dexter U-bolt plates, and 2 U-bolts. They were really easy to replace and I did it quickly. Looks great, gonna take her out soon.



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I am building a unique little project that I needed extra spring plates for. I naturally came to etrailer and they didn't disappoint. As always, easy ordering, quick shipping, good people, great product.



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Good lead time on shipping


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Info for this part was:

Employee Lindsey S
Updated by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Cole B
Installed by:
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