1. Trailer Leaf Spring Suspension
  2. Redline
  3. U-Bolts
  4. Axle Mounting Hardware
  5. Square Axle - 1-1/2 Inch
  6. 5 Inch Long
1-1/2" Square Trailer U-Bolts (Qty 2)

1-1/2" Square Trailer U-Bolts (Qty 2)

lowest price pledge
Retail:$27.68
Our Price: $25.55
You Save: 8%
Trailer Leaf Spring Suspension
Orders above $99 qualify for Free Shipping
Shipping Weight: 1.5 lbs
Quantity: 
In Stock
SP01-120 - 1/2 Inch Diameter 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

Lowest Prices for the best trailer leaf spring suspension from Redline. 1-1/2" Square Trailer U-Bolts (Qty 2) part number SP01-120 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (93)
  • Q & A (13)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Trailer Leaf Spring Suspension

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


Square Trailer U-Bolt

  • Width: 1-1/2"
  • Diameter: 1/2"
  • Length: 5"
    • Threaded portion measures 2"
  • For 3,500-lb axles only
  • Includes Lock Nuts

071090 Redline Square Trailer U-Bolts with Nuts and Washers

Item # SP01-120





Video of 1-1/2" Square Trailer U-Bolts (Qty 2)

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




Video Transcript for Redline Trailer Suspension SP01-120 Review

Today we'll be reviewing part number SP01-120. This is Red Line's 1 1/2 inch Square Trailer U-bolts. You're going to get two U-Bolts and you're going to get four nuts. The width of the U-bolts. We're measuring the distance between the two bolt posts. Is going to measure an inch and a half.

Each bolt is going to give us a diameter of a half inch. The length that we have from the bottom of the cross member to the bottom of the mounting post or the bolt post is going to be 5 inches. The threaded portion going to measure right at 2 inches. This is for 3500 pound axles 00:43 only. Again, you're going to get two U-bolts, measure a half inch in diameter, and you're going to get four nuts.

That's going to do it for our review of part number SP01-120. This is Red Line's 1 1/2 inch Square Trailer U-bolts. .


Customer Reviews

1-1/2" Square Trailer U-Bolts (Qty 2) - SP01-120

Average Customer Rating:  4.8 out of 5 stars   (93 Customer Reviews)


- SP01-120
by:

These U-Bolts were exactly what I needed to replace the 1 1/2" wide ones on my 1966 Silver Streak travel trailer. When I started this project I had no idea how hard parts were going to be to find. When I brought the original U-Bolts in to my local (Anchorage, AK) trailer supply place and also a custom spring shop they all looked at them like they had dropped in from outer space. etrailer had exactly what I needed to get our vintage trailer back on the road. This will be my first stop the next time I need parts for my not so standard trailer. Thanks etrailer.com!



- SP01-120
by:

Excellent product, bolted right on, great fit. Several orders through etrailer.com have yet to be disappointed



- SP01-120
by:

I purchased these U bolts to upgrade the suspension on my trailer. I would get a a lot of trailer sway when I was towing my jet ski trailer. I bought the trailer used and never really looked at the springs. Unfortunately for me, There was nothing but one U bolt strapped diagonally across the spring. I'm no suspension expert but I knew this could NOT be safe. I did extensive research on trailer suspension. It was difficult to find parts for a 11/2 inch square axle. It was until I came across etrailer webpage. They had everything I required to upgrade and make my trailer safe to operate on the road. It was actually criminal what the person did to attach the original spring. I am greatful nothing ever happened while towing. Now with the new parts installed, I feel a lot better and my trailer does not sway anymore. I will definitely purchase my trailer needs from etrailer from now on. The pictures and videos make finding what I needed so much easier. The complete transaction from order to delivery was extremely efficient and the customer service is absolutely outstanding.



- SP01-120
by:

I purchased the 3000# axle springs and all mounting hardware to replace the old ones on my 1963 travel trailer. My trailer no longer leans to the left and goes down the road better than new. I should have done it many year ago. I received my package on time and installation was easy and fit perfect. Thanks Bridget



- SP01-120
by:

I was very impressed with the quality of these square U bolts. The bends were smooth with no stress cracking. The legs of the bolts were parallel and the nuts were a very high quality.



- SP01-120
by:

Worked great!



- SP01-120
by:

The u-bolts that I ordered from etrailer arrived quickly, even tho I chose the economy shipping option. The bolts are a hard to find item and are exactly as shown on the etrailer website. I am very pleased and won't hesitate to make additional purchases from etrailer.com



- SP01-120
by:

worked well, no issues and sizing was spot on.



- SP01-120
by:

very good products and excellent customer support.



- SP01-120
by:

Perfect fit. Everything went together very smoothly.


Comments
great, no problems with about 1000 miles on the new parts now.
Michael E - 05/10/2019



- SP01-120
by:

I ordered these bolts to use on my '63 Shasta (Canned-Ham ) Compact camper. The old girl had developed a squat worse than factory and that sat low. I removed the axle and springs and moved the axle below the springs and added a new plate with a tab to mount shocks that this trailer never had. The ubolts arrived in about 1 week and worked perfectly. The camper is a joy to tow now.


Comments
Al, how did you deal with the nub on the bottom of the spring stack? I have 1 1962 Compact.
-- comment by: Don M - 08/11/2014

Comments
There is a square plate top and bottom .There is a hole I drilled in one for the rivet that hold the springs together.
-- comment by: Al - 08/13/2014


- SP01-120
by:



- SP01-120
by:

The U bolts and spring plates were of good quality, but the price was much higher than it should be. I needed them so I bought them, even though the price was way too high.


Comments
Good
Landy - 06/30/2019



- SP01-120
by:



- SP01-120
by:

These U-bolts are massive and exactly what I needed to upgrade my trailer suspension. Great service and fast delivery, too. Etrailer.com is my new go-to for anything trailer related.



- SP01-120
by:



- SP01-120
by:



- SP01-120
by:

These U-bolts were hard to find any where else. As always, etrailer came thru. The U-bolts went perfect with the plate that I also ordered from etrailer. The part went on with ease on my old Gamefisher trailer. Road tested it today and its holding good and no problems. Everything that I have ordered from etrailer has a very good price and great inventory that no one can match.


Comments
Its been a year since I put this on my trailer and its working great. No problems at all. Thanks etrailer for having hard to find parts and great service.
Robert - 03/08/2019



- SP01-120
by:

Products arrived very quickly and in good shape. had to do some modification on installation as its an odd ball trailer but happy with the results . Jim.


Comments
Great!!
Jim R - 07/31/2015



- SP01-120
by:



- SP01-120
by:



- SP01-120
by:

Exactly the item I needed! 3 places in my not so small but not so big town, did not carry these. I am glad that I looked on-line and the best part was the price was very reasonable for these u-bolts. Shipping was on time too!!



- SP01-120
by:

I was struggling to find the precise u-bolt and had to cancel my first order. Etrailer.com stayed with me and found exactly what I needed. So nice to work with a retailer determined to get you what you need. Thank you!



- SP01-120
by:

These are exactly what we were looking for. etrailer is the only place we could find the 1.5" Size in a 1/2" diameter square u-bolt.



- SP01-120
by:


31
101
Show More Reviews

Ask the Experts about this Redline 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 Patrick B
Expert Research:
Patrick B
Employee Adam R
Expert Research:
Adam R
Employee Kathleen M
Video by:
Kathleen M
Employee Cole B
Installed by:
Cole B

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.