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Trailer Square U-Bolts (Qty 2), 2-3/8" x 5-1/4" x 3/8"

Trailer Square U-Bolts (Qty 2), 2-3/8" x 5-1/4" x 3/8"

Item # 382385UB
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Our Price: $21.03
Boat Trailer Parts
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Shipping Weight: 0.87 lbs
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Redline Roller and Bunk Parts - 382385UB
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Trailer U-bolts ideal for boat, snowmobile, and standard utility trailers. Call 800-298-8924 to order Redline boat trailer parts part number 382385UB or order online at etrailer.com. Free expert support on all Redline products. Guaranteed Lowest Price and Fastest Shipping for Trailer Square U-Bolts (Qty 2), 2-3/8" x 5-1/4" x 3/8". Boat Trailer Parts reviews from real customers.
  • All Info
  • Reviews (18)
  • Q & A (1)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Boat Trailer Parts - 382385UB

  • Roller and Bunk Parts
  • U-Bolts
  • 5-1/4 Inch Long
  • Redline
  • Zinc-Plated Steel
  • 2-3/8 Inch Wide
  • 3/8 Inch Diameter

Trailer U-bolts ideal for boat, snowmobile, and standard utility trailers.


  • Zinc plated to resist corrosion
  • Square bend simplifies attachment of hardware to square trailer frames


  • U-bolt dimensions:
    • A: 2-3/8"
    • D: 3/8"
    • L: 5-1/4"
  • Threads measure 2-1/8" long

cargo control bolt display

382385UB Trailer Square U-Bolts (Qty 2), 2-3/8" x 5-1/4" x 3/8"

Video of Trailer Square U-Bolts (Qty 2), 2-3/8" x 5-1/4" x 3/8"

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Redline Boat Trailer Parts - Roller and Bunk Parts - 382385UB Review

Today, we're going to be taking a look at part number 382385UB. This is the U-bolt kit for trailers with square frames. These are going to be perfect for boats, snowmobile and standard utility trailers. They can be used for many different applications when it comes to attaching your items to your trailer frame. These are going to be made from a metal construction, and they're going to have a nice, zinc-plated finish on it, so they're going to resist rust and corrosion. You're going to get two U-bolts.

You're going to get four flat washer and four lock nets. The square bend here on the U-bolt is going to simplify the attachment of your hardware to your square trailer frame. We're going to take a look at some of the dimensions real quick. Starting with just the length of the threaded portion, that looks like it's going to give us a measurement of about 2 1/8". From the bottom of the threads to the inside edge at the top portion right here, that's going to give us a measurement of 5 1/4". The opening that we have in between the down portions of the U-bolt, that's going to give us a measurement of about 2 3/8".

Then, center on center, the distance that we have between the studs, that's going to give us a measurement of about 2 11/16" of an inch. The diameter of the U-bolts themselves, those are going to measure 3/8". Again, they are designed for square trailer frames. That's going to do it for today's review of part number 382385UB.

Customer Reviews

Trailer Square U-Bolts (Qty 2), 2-3/8" x 5-1/4" x 3/8" - 382385UB

Average Customer Rating:  4.9 out of 5 stars   (18 Customer Reviews)

Trailer U-bolts ideal for boat, snowmobile, and standard utility trailers.

- 382385UB

Items were as advertised, shipping was fast 892933

- 382385UB

Perfect. As described. A bit long on delivery, but it worked out okay. Bernie 662871

Just what I needed to upgrade by boat.
Bernie B - 06/26/2020


- 382385UB

Everything arrived without a problem, just wish there had been a packing slip sent with it! 583909

- 382385UB

Perfect for my trailer. 558483

- 382385UB

Worked perfect to bolt a tool box on the front of my trailer on the 2x4 frame. 556404

- 382385UB

Just as always great price great product and the shipping is out standing. It doesn't take long to get any thing from them even on the west cost standard shipping I could get it in a week most of the time. 518002

- 382385UB

etrailer shipped fast and product was just what I needed but no nobody else seemed to have. 478611

- 382385UB

Quality product and quick shipping than ks 460356

- 382385UB

I received exactly what I ordered and in a timely manner. Great company and excellent customer service. I ordered a bolt square head u-bolt that I couldn't source locally. I needed a particular size as I am building a custom motor mount for s kayak. 380078

- 382385UB

Excellent service. Prices are good. Recommend doing business with. 347757

- 382385UB

Having to redo totally my Pontoon boat trailer. I needed some advice, called in and spoke with an Engineer to narrow my options. Very helpful. I was able to order parts and get them within one (1) week. Good job guys 317040

- 382385UB

My order was filled as requested and received on time. Products I received were good as I expected them to be. This was my first order with etrailer and I will shop again if the need arises. The products I ordered were for making the tongue on a boat trailer. They worked as expected. 285959

Bill J - 08/20/2017


- 382385UB

The roller and bracket for my boat trailer came in a few days before I was expecting them. A pleasant surprise indeed. Parts was exactly as described and fit my boat trailer perfectly. I am very pleased with the assistance I received from the person that took my order along with their service. 221891

Very good
Tom P - 08/25/2016


- 382385UB

Excellent A+ Service! Fast delivery! 205650

- 382385UB

Great 174951

- 382385UB

Bolts were just what they said they were, looks like a good qulity product. 172060

- 382385UB

these u bolts are just what I needed. could not find them anywhere local. I am using them to install an extra brace on my boat trailer wind guides. 90014

- 382385UB

These are good quality U-Bolts. 57142


Ask the Experts about this Redline Boat Trailer Parts

  • Hardware for Redline Bolt-On Trailer Fender Brackets
    We don't offer bolts that fit the bracket perfectly that will fit around your rather tall trailer frame. If it's not a boat trailer, you might be able to use the # 382385UB U-bolts. The bolts are 5-1/4 inches long, so they'd be tall enough to fit around your trailer frame, but they span 2-3/8 inches, so you'd need to drill a hole in the bracket to accommodate the U-bolt. If it's a boat trailer, or you'd rather not drill holes in the bracket, you'd probably want to use a galvanized U-bolt...
    view full answer...

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Info for this part was:

Updated by:
Laura H
Updated by:
Sarah W
Installed by:
Cole B

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