1. Trailer Leaf Spring Suspension
  2. Redline
  3. U-Bolts
  4. Axle Mounting Hardware
  5. Square Axle - 2 Inch
  6. 5-1/4 Inch Long
Replacement U-Bolt for 2" Wide, Square Axles - 1/2" Diameter - Zinc Plated

Replacement U-Bolt for 2" Wide, Square Axles - 1/2" Diameter - Zinc Plated

Item # UBZC12X212X525
lowest price pledge
Our Price: $3.86
Trailer Leaf Spring Suspension
Orders above $50 qualify for Free Shipping
Shipping Weight: 0.59 lbs
Quantity: 
In Stock
UBZC12X212X525 - 5-1/4 Inch Long Redline Trailer Leaf Spring Suspension
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Videos

Need help with installation?
Locate installers near me
This 5-1/4" long U-bolt works with a U-bolt plate and another U-bolt to help secure your 2" wide, square trailer axle to its leaf springs. Sturdy, zinc-plated steel resists corrosion. Lowest Prices for the best trailer leaf spring suspension from Redline. Replacement U-Bolt for 2" Wide, Square Axles - 1/2" Diameter - Zinc Plated part number UBZC12X212X525 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (105)
  • Q & A (5)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Trailer Leaf Spring Suspension - UBZC12X212X525

  • U-Bolts
  • Axle Mounting Hardware
  • Square Axle - 2 Inch
  • 5-1/4 Inch Long
  • 3500 lbs
  • 1/2 Inch Diameter
  • Redline

This 5-1/4" long U-bolt works with a U-bolt plate and another U-bolt to help secure your 2" wide, square trailer axle to its leaf springs. Sturdy, zinc-plated steel resists corrosion.


Features:

  • Replacement U-bolt acts as part of a trailer suspension system
    • Used with another U-bolt (sold separately) and a U-bolt plate (not included) to secure one side of your axle to a leaf spring, which is mounted to your trailer's frame
  • Square bolt fits square axle beams
  • Zinc-plated steel construction is heavy duty and corrosion resistant
    • Ideal for use on boat or snowmobile trailers
  • 1 U-bolt included


Specs:

  • Application: 2" wide axles
  • Inner width: 2-1/8"
  • Length: 5-1/4"
  • Bolt size: 1/2"-13


U-Bolt Diagram


UBZC12X212X525 Redline Square Zinc Plated U-Bolt for 2" Trailer Axles - 2-1/8" Inner Width - 1/2" Diameter - 5-1/4" Long





Video of Replacement U-Bolt for 2" Wide, Square Axles - 1/2" Diameter - Zinc Plated

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




Video Transcript for Redline Trailer Suspension UBZC12X212X525 Review

Today we'll be reviewing part number UBZC12X212X525. This is Red Line's replacement U-bolt for 2-inch wide square trailer axles. It's going to act as part of a trailer suspension system. It's going to be used with another U-bolt. It's going to be sold separately as well as the U-bolt Plate, also sold separately, to secure one side of your axle to a leaf spring which is mounted to your trailer's frame. The square bolt is designed to fit square axle beams. Has a really nice zinc plated steel construction so it's going to be very heavy duty and corrosion resistant. It's going to be ideal for use on boat or snowmobile trailers.

One bolt is included with this part number. Again, it's designed for 2-inch wide axles. The inner width between the bolt posts is going to measure 2 1/8 of an inch. The length that we have from the bottom of the cross member to the bottom of the bolt post is going to measure 5 1/4. Then the bolts are going to give us a diameter of a half inch. The threaded portion on each bolt is going to measure right at 2 inches in length. That's going to do it for our review of part number UBZC12X212X525.

This is Red Line's replacement U-bolt for 2-inch wide square trailer axles.


Customer Reviews

Replacement U-Bolt for 2" Wide, Square Axles - 1/2" Diameter - Zinc Plated - UBZC12X212X525

Average Customer Rating:  4.9 out of 5 stars   (105 Customer Reviews)

This 5-1/4" long U-bolt works with a U-bolt plate and another U-bolt to help secure your 2" wide, square trailer axle to its leaf springs. Sturdy, zinc-plated steel resists corrosion.

- UBZC12X212X525
by:

etrailer has always had what I needed when no one else did. They are my #1 source for any of my trailer needs.



- UBZC12X212X525
by:

I bought springs, shackle bolts, and u-bolts and plates. Everything was great and fit perfectly. Only issue were the u bolts which were not galvanized. However, at a local trailer store, I bought galvanized U bolts for $4.50 each. For the DYIers, taking the old ones off took more than 4 hours for each side. My existing shackle bolts were so heavily rusted that I had to cut three off with a hack saw. Difficulty was confined space to operate hack saw with boat still on trailer. However, reassembling the new springs was less than 45 minutes each side. Must have tools are large diameter 3/4-13/16-7/8 deep sockets (6 point), 2 2 foot long breaker bars and a can of PB blaster. For safety: Good quality jack stands, minimum of 3--don't rely on the front trailer jack as it may roll. By the way, I did these myself and I am 64 years old.



- UBZC12X212X525
by:

Worked great fast shipping



- UBZC12X212X525
by:

Excellent products. All were very well made. Very fast delivery. Extremely happy dealing with etrailer. Will definitely order from etrailer in the future. Also hard to find galvanized parts. Would refer friends to etrailer.


Comments
Everything I have purchased from trailer has been of the highest quality and after a years use, still performs excellently.
Johnny B - 01/23/2020



- UBZC12X212X525
by:

These products are very difficult to find except at etrailer.com They had the exact product: Square U-Bolts to fit a 4 inch x 2 inch framed trailer. It's impossible to find these locally, (for me), but one stop at etrailer.com took care of my needs.



- UBZC12X212X525
by:

Great price, quality product!



- UBZC12X212X525
by:

Quick delivery, well packaged. Exactly what I wanted to use on my tractor ROPS bar. Will be back for more components for my next project.


Comments
High quality, no issues holding light bars on tractor
John M - 04/07/2020



- UBZC12X212X525
by:

what can I say, it works.


Comments
After a year of using my boat trailer all the parts I bought from etrailer are doing just fine.
Michael O - 03/27/2021


- UBZC12X212X525
by:

Excellent quality. May have to adjust for length. would like to have more variety in assortment. Over all rugged and will get the job complete :)



- UBZC12X212X525
by:

I ordered several items for my boat trailer to replace the springs and renew the related hardware. There was a little glitch, as the springs were sold out in inventory. The etrailer staff quickly advised me of this issue and offered alternatives. However, my order was shipped was shipped within a few days and arrived as ordered. I will definitely use etrailer again.



- UBZC12X212X525
by:

I ordered parts from etrailer.com before and this time the service was as good as the last time. Parts were identified very well and they fit perfect. Thanks again for the great service. I also found out that my son ordered his trailer hitch for his new Ford van from you and he says he'd do it again. Thank you , Tom



- UBZC12X212X525
by:

High quality U bolts to mount a trailer tongue toolbox on my main beam of my trailer. Etrailer has many hard to find products & fast shipping & always great customer service. I use them fairly often. When searching for anything for trailers.....start here.



- UBZC12X212X525
by:

Great product



- UBZC12X212X525
by:

Rebuilt trailer suspension, should be good for another 20 years. One of my old springs snapped.



- UBZC12X212X525
by:

Perfect replacement part fit and function no alterations were necessary and fast shipping. I replaced the worn out springs on my 1987 Skeeter boat trailer and was mad that I had not done it sooner. All the replacement parts fit perfect.



- UBZC12X212X525
by:

Products were as advertised. Easy to use due to the quality of the parts . I will use etrailer for all my trailer needs and let my garage buddy's know of etrailer also



- UBZC12X212X525
by:

Products are great and for a fair price. Be aware that the square u bolts have course threads and the nuts they sell for boat trailer u bolts have fine threads. I had to use some from a local store. Super fast shipping got me back fishing in no time!



- UBZC12X212X525
by:

Happy with this.



- UBZC12X212X525
by:

Ordered these for my boat trailer,I use them to attach cradeles to it to hold my Hobie cat boat,they fit perfectly.



- UBZC12X212X525
by:

One year later and no signs of rust. Used on a boat trailer. Fully submerged in salt water multiple times. Great product!!!



- UBZC12X212X525
by:

The U bolts fit fine and worked perfect! Go Gatos!!!



- UBZC12X212X525
by:

After a long search, etrailer had exactly what I needed. Delivered when promised.


Comments
It has held up wonderfully.
Monty - 05/12/2017



- UBZC12X212X525
by:

Identical replacement for the rusted u-bolts I broke while repositioning bunk.



- UBZC12X212X525
by:

Matched what came off the trailer. Don't forget nuts and anti-seize. Suprised how fast it was delivered considering it was by ground transport.



- UBZC12X212X525
by:

Excellent product, very quick delivery! Will shop here again and recommend entrailer to friends!


25
105
Show More Reviews

Ask the Experts about this Redline Trailer Leaf Spring Suspension

  • U-Bolt Recommendation for 2 inch Square Axles
    Is your square axle a 2 inch square axle? I believe it most likely is and you would want the # UBZC12X212X525 for a replacement u-bolt as this is 5-1/4 inches long and fits a 2 inch square axle. For nuts you would want the # 12ZLN and then for a bottom plate # 117594-G.
    view full answer...
  • Availability of 3/8-Inch Diameter Square U-Bolts 3-1/8-Inch Wide by 5-1/4-Inch Long
    We do offer a range of u-bolts and u-bolt kits and all can be seen on the link provided. I was not able to find a 3/8-inch diameter 3-1/8-inch wide by 5-1/4-inch long square u-bolt. All the u-bolts that have 3/8-inch diameter are round. The one square u-bolt we have that is 5-1/4-inches long is only 2-1/8-inches wide (part # UBZC12X212X525). You can use the filters at the left-hand margin to sort the products; perhaps you can find a suitable substitute.
    view full answer...
  • 5 Inch Long U-Bolt Recommendation for Square Trailer Axles
    The closest thing we have that would potentially work for you would be the # UBZC716X212X400 but it's an inch too short. A better option would be the part # UBZC12X212X525 but it has a 1/2 inch diameter. See picture. I am assuming you are looking for axle u-bolts.
    view full answer...
    Image 1 for
  • Need for Additional U-Bolts to Install CE Smith Roller-Style Guide-Ons CE27610
    The CE Smith Roller-Style Guide-Ons # CE27610 will fit your 2 x 2-inch trailer frame. The standard included brackets work with frame members up to 3-inches wide and 4-1/4-inches tall. It is a good idea to add another u-bolt to each guide-on in your application. I linked our main page for trailer u-bolts where you can see items like CE Smith U-Bolt Kit # CE23103 and # UBZC12X212X525.
    view full answer...
  • Zinc Platted U-Bolt or Square 2” Wide x 3" Tall Trailer Axles
    I looked up your order and the 4-Leaf Double-Eye Spring part # SP-051275 you have is about 1-1/2" thick. Since you axle is 3" tall you would need a u-bolt that is at least 4-1/2" tall. Therefore, I recommend taking a look at the Replacement U-Bolt part # UBZC12X212X525 which is 5-1/4" long x 2-1/8" wide. This u-bolt is zinc plated and for the correct lock-nut you will want to use part # 12ZLN.
    view full answer...

Do you have a question about this Trailer Leaf Spring Suspension?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality trailer leaf spring suspension for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer leaf spring suspension information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Adele M
Updated by:
Adele M
Employee Wilson B
Updated by:
Wilson B
Employee Kathleen M
Video by:
Kathleen M
Employee Cole B
Installed by:
Cole B
Employee Lisa S
Written by:
Lisa S

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.