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  1. Boat Trailer Parts
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  3. Roller and Bunk Parts
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  5. 4 Inch Long
  6. Zinc-Plated Steel
CE Smith U-Bolt - Zinc-Plated Steel - 4" Long x 2-1/8" Wide x 7/16" Diameter - Qty 1

CE Smith U-Bolt - Zinc-Plated Steel - 4" Long x 2-1/8" Wide x 7/16" Diameter - Qty 1

Item # CE15251A
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CE Smith U-Bolt - Zinc-Plated Steel - 4" Long x 2-1/8" Wide x 7/16" Diameter - Qty 1 U-Bolts CE15251A
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Multipurpose U-bolt intended for use on trailers to help secure brackets, mounts and cargo. It is constructed of sturdy, zinc-plated grade 5 steel, and it comes with mounting hardware. 1-800-940-8924 to order CE Smith boat trailer parts part number CE15251A or order online at Free expert support on all CE Smith products. Great prices and Fastest Shipping for CE Smith U-Bolt - Zinc-Plated Steel - 4" Long x 2-1/8" Wide x 7/16" Diameter - Qty 1. Boat Trailer Parts reviews from real customers.
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  • Reviews (23)
  • Q & A (0)
  • Videos (1)
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  • Why etrailer?

CE Smith Boat Trailer Parts - CE15251A

  • Roller and Bunk Parts
  • U-Bolts
  • 4 Inch Long
  • Zinc-Plated Steel
  • 7/16 Inch Diameter
  • 2-1/8 Inch Wide
  • CE Smith

Multipurpose U-bolt intended for use on trailers to help secure brackets, mounts and cargo. It is constructed of sturdy, zinc-plated grade 5 steel, and it comes with mounting hardware.


  • Heavy-duty U-bolt helps to secure a bracket to your trailer's frame
  • Zinc-plated grade 5 steel construction is sturdy and resists corrosion
  • Includes mounting hardware
  • Made in the USA


  • Quantity: 1 U-bolt
  • Dimensions: 4" long x 2-1/8" wide x 7/16" diameter
  • Threads per inch: 14
  • Grade 5

15251A Zinc-Plated Steel Replacement U-Bolt by CE Smith - 4" Long x 2-1/8" Wide x 7/16" Diameter

California residents: click here

Video of CE Smith U-Bolt - Zinc-Plated Steel - 4" Long x 2-1/8" Wide x 7/16" Diameter - Qty 1

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

Video Transcript for Review of CE Smith Boat Trailer Parts - Zinc Plated Steel U Bolt With Hardware - CE15251A

Hi, everybody. Andy here with And today, we're gonna take a brief look at the CE Smith zinc plated steel U-bolt. This heavy-duty, multipurpose U-bolt is intended for use on trailers to help secure brackets, mounts, and cargo to your trailer's frame. This is made in the USA of sturdy, zinc plated, grade five steel, making it resistant to corrosion. It includes everything that you see here before me.

You're gonna get one U-bolt, two washers, and two nylon lock nuts. And let me go ahead and pull out my ruler here and just give you some measurements. Measuring the inside of the U-bolt, the length is gonna be sitting right at four inches long. And the inside width, we are looking at, looks like 2 1/8 inches on that inside width. And the diameter's gonna be 7/16 of an inch.

The threaded section is right at two inches long. And this has 14 threads per inch. Well, that's gonna conclude our quick look today. I do hope that it was helpful for you. Again, my name is Andy.

Thank you for joining me..

Customer Satisfaction Score:

Customer Reviews

CE Smith U-Bolt - Zinc-Plated Steel - 4" Long x 2-1/8" Wide x 7/16" Diameter - Qty 1 - CE15251A

Average Customer Rating:  4.8 out of 5 stars   (23 Customer Reviews)

Multipurpose U-bolt intended for use on trailers to help secure brackets, mounts and cargo. It is constructed of sturdy, zinc-plated grade 5 steel, and it comes with mounting hardware.


Well, this roller is fine, but ALL my dealings with you folks have been wonderful.

I've bought hitches and wiring and when my tow car had a bad battery and I thought it was the harness, you sent me a replacement right away...which I promptly sent back!

Thanks for being that rare thing....a business who cares about their customers.

I will always come back to you in the future....

Hitch and wiring by trailer.....!


Great service. Prompt shipping and the company keeps you informed of the status of your order.


Nice quality and quick delivery


Sometimes when refurbishing a boat trailer it's difficult to find the correct sized u-bolts. I ordered 7/16 but I think I needed 1/4. I don't remember seeing 1/4 on the website. Anyway the bolts were delivered in a very reasonable amount of time and appear to be a very well made product. I just had to drill out the holes a little bit on my side bunk supports but that's my own fault. Now my trailer is pretty much back to new and I'm ready to go catch a flounder or two. Thanks etrailer for helping me get everything ready to go.


All went well good fit and good quality


Needed more threads for my application. Used a spacer and an extra washer.


You won't find this stuff at [local stores]. You won't find this at [on-line retailers]. Yes, all the above have square u-bolts but in limited sizes. Want to mate a 2" cross member on a 3" frame? You go where I always go... you go to


Used these U-bolts to attach my fender step brackets to the frame on my Shorelander boat trailer. Worked great!


So far so good.Right size and fit.I would buy this /these products again from


Purchased bunk brackets and installation hardware. Perfect fit. No drama. Very satisfied.


Used to install brackets for additional bunks on a lift - worked great!


Fits my ezloader trailer perfectly


products arrived quick and wa just what i needed.. will order again..great people


Always great products, fast shipping and good prices, thanks again


these fit good


Quick delivery, good quality, great product choice.



Always have what I need







See what our Experts say about this CE Smith Boat Trailer Parts

  • Width of CE Smith U-Bolt # CE15251A
    I went out to our warehouse to take a look at the CE Smith U-Bolt # CE15251A and found that the listed 2-1/8" (2.125") width is indeed from the inside of one bolt to the inside of the other. This will fit over a 2" x 3" box frame. I have attached a diagram to assist.
    view full answer...
  • Availability of 2 Inch Bow Roller Bracket for Boat Trailer
    We don't offer a 2 inch bow roller/bracket. The smallest we offer is a 3 inch, like part # CE29334. The shaft and hardware is zinc plated for corrosion resistance. The roller bracket, like # CE31005PG is pre-galvanized which means it was galvanized before it was formed into its finished shape. We don't offer the hardware for mounting the bracket to the trailer.
    view full answer...
  • Recommended Replacement Front Bushing, Rear Bushing, And Ubolts For Trailer
    We have the parts you are looking for! 4" long x 2 1/8" wide x 7/16" thread Ubolts # CE15251A. The 2 1/8" is measured from inside to inside so these will be right at 2 1/4" outside to outside. 9/16" I.D. x 7/8" O.D. 1 3/4" long Front Bushing # TRBU11568 we do not have a bushing with 5/8" inner diameter, 9/16 is the closest and will work fine as it is 1/16" smaller. 1/2" I.D. x 7/8" O.D. 1 3/4" long Rear Bushing # TRBU11508.
    view full answer...
  • Replacement Wobble Rollers and U-Bolts for a 1989 Venture Boat Trailer
    In order to determine the correct replacement wobble rollers for your 1989 Venture boat trailer I would need to know the overall diameter of the roller in addition to the diameter of the shaft. For example, the Yates Ribbed Wobble Roller part # YR343R-6P has a 4-3/8" overall diameter with a 3/4" shaft. Once you can let me know what the above two dimensions are I would be happy to inform you of which replacement wobble rollers you need for your boat trailer. I have also attached our selection...
    view full answer...
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  • Availability of 7/16 Nuts to Fit Redline Replacment U-Bolt UBZC716X212X400
    The reason why you couldn't find the matching 7/16"-14 nuts to go with the Replacement U-Bolt for 2" Wide, Square Axles - 7/16" Diameter # UBZC716X212X400 is because we do not carry them. We carry U-Bolt kits that include the matching nuts and washers, like part # CE15251A, which are the same grade (GR 5) and share the same dimensions (4" long x 2-1/8" wide x 7/16" diameter). Or, part # CE23103, which includes the more common 4-1/2" long x 1/2" diameter U-bolts for 2" square axles, hardware...
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee David L
Written by:
David L
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M
Employee Andy C
Installed by:
Andy C

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