2" Square Trailer U-Bolt (Qty 2)

2" Square Trailer U-Bolt (Qty 2)

Item # SP01-160

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Trailer Leaf Spring Suspension

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Shipping Weight: 2 lbs

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Redline 9/16 Inch Diameter Trailer Leaf Spring Suspension - SP01-160
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Videos


  • Axle Mounting Hardware
  • U-Bolts
  • Square Axle - 2 Inch
  • 5-3/4 Inch Long
  • 9/16 Inch Diameter
  • 3500 lbs
  • Redline
Square Trailer U-Bolts Lowest Prices for the best trailer leaf spring suspension from Redline. 2" Square Trailer U-Bolt (Qty 2) part number SP01-160 can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (117)
  • Q & A (19)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Trailer Leaf Spring Suspension - SP01-160

Square Trailer U-Bolts


Features:

  • 2" Wide
  • 9/16" Diameter
  • 5-3/4" Long
  • Length of threaded section: 2-1/2"
  • Inner width: 2-1/8"
  • Includes nuts


SP01-160 2" Square Trailer U-Bolt (Qty 2)







Video of 2" Square Trailer U-Bolt (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 SP01-160 Review

Today we are reviewing SP01160. This is a set of two 2-inch square trailer U-bolts and they are used with U-bolt plates for 2-inch square axles. Those are sold separately as part number 117594 and that plate, along with these U-bolts will secure the trailer axle to the leaf springs and those are mounted to the trailer frame. So, what you have here are two 9/16th inch diameter bolts that are, here we go, 5-3/4 inches long. The threaded portion right here, as you can see, is 2-1/2 inches long and the diameter, inside-to-inside here, is 2 inches. These bolts do come with the nuts that you will need and that is it for Part Number SP01160 from Redline, 2-inchSquare Trailer U-Bolts.


Customer Reviews

2" Square Trailer U-Bolt (Qty 2) - SP01-160

Average Customer Rating:  4.8 out of 5 stars   (117 Customer Reviews)

Square Trailer U-Bolts

- SP01-160
by:

Products are as advertised and of excellent quality. Prompt shipping and professional. No fuss, no muss... what more could I ask for! 501219


Comments

Still on my boat trailer no issues!

Christian - 04/27/2019

54556

- SP01-160
by:

I needed "U" bolts for a 2" square axle.These fit perfectly.Thankyou 63094


Comments

still working great after 1 year.I used these on a boat trailer,which I use alot.

Dean - 07/22/2014

5809

- SP01-160
by:

my friend ordered springs and hardware for my pontoon trailer. man did they get here fast. everything in one box. packed real good. no damage, nothing lost or left out. I finally got everything back together. fits great. i was worried that the springs where going to be to light, but the trailer sits just like new. sorry no pics. I was to greasy to get the camera out. But its like new again. yes etrailer.com i'm gonna be back next time I need parts. and i've already told all my friends with boats and trailers about etrailer.com . I am a happy customer. thanks again. C Finley 317074


Comments

Thanks for your follow up. Parts are still doing fine. I am still veryhappy with my shopping exp. With etrailer, and I have had the opportunityto share my exp with several people hope they come shopping with you.

chuck f - 11/15/2017

30873
Comments

Thanks for your follow up. Parts are still doing fine. I am still very happy with my shopping exp. With etrailer, and I have had the opportunity to share my exp with several people hope they come shopping with you.

chuck f - 11/15/2017

30878

- SP01-160
by:

Cheap China parts 398232



- SP01-160
by:

Worked great fit was good. I did not use standard nuts furnished but used Nylon lock nuts instead. 107393


Comments

No problems....still like it and still going strong on my boat trailer!

David P - 11/14/2014

7654

- SP01-160
by:

SP01-160 U Bolts look to be good quality just wish they came with lock washers. TRTP200175 U Bolt spring plates work well with these U Bolts. I ordered 4 of these and got 1 and 3 #117594 plates which are very nice and look more heavy duty. I thought I got stiffed with the one oddball one but I didn't I ordered the cheaper ones and got 3 of the heaver duty ones. I also ordered #LC281285 Never Fail Tandem Axle Suspension Hardware Kit and one bolt in the kit is to long like its for a 2" wide spring. Guess I will just use one of the old ones I took out. And 4 #SP-051275 4 leaf double eye leaf springs. I am redoing the suspension on a fiber splicing trailer that was damaged during hurricane Michael. All in All etrailer has great prices and fast shipping and great customer service. 653954



- SP01-160
by:

as described 640734



- SP01-160
by:

Worked well, shipped fast, install was easy 640539



- SP01-160
by:

U-bolts worked great 639700



- SP01-160
by:

Very heavy duty steel and worked for my application. Sadly they are not galvanized; hence the 4 star rating. I prepped, primed, and painted them well so they should hold up. Used to hang fenders on a boat trailer. 611529



- SP01-160
by:

Just installed, not driven with it yet, but works as designed. 602441



- SP01-160
by:

LIghtning fast shipping. Great email communication. High Quality Product. 582590



- SP01-160
by:

Dynamite sales lady, product and servic e. 581502



- SP01-160
by:

this is a great product , looking for economic pricing , friendly and fast shipping, look no further but to etrailer thanks guys 560736



- SP01-160
by:

My second purchase from etrailer and I am happy to say the results were as expected 1. Items as described 2. Delivery was on time as promised (Of course once it is out the door it depends on the carrier to make the promise good) 3. Customer service is stellar, notifications... we got your order....we shipped it today.... we were notified it was delivered.... are you happy 553313



- SP01-160
by:

Just what I need to properly replace my leaf springs. Quality materials - solid. 540572



- SP01-160
by:

Products are as advertised and of excellent quality. Prompt shipping and professional. No fuss, no muss... what more could I ask for! 501220


Comments

Still on my boat trailer no issues!

Christian - 04/27/2019

54557

- SP01-160
by:

Very pleased with all my purchases from this company. No issues. I would recommend. 496707



- SP01-160
by:

Great bolts for my 2" axle over 2" springs. Much heavier than the OEM bolts, not worried about them breaking anytime soon. Chose to cut them down by 1.25" to better fit the spring gap on my overslung axle to maximize spring travel length on my HF trailer, but that was a personal choice, not a requirement. 428606



- SP01-160
by:

Easy install 412789



- SP01-160
by:

Excellent fit, torqued and held torque, but need a better protective finish, in less than 2,000 miles they are rusting pretty bad. I'm going to take them back off, bead blast them and re coat with some type of epoxy o rust resistant paint. 397445



- SP01-160
by:

Threads were clean and sharp 395836



- SP01-160
by:

Quality is excellent,I wish I had ordered lock nuts and washers as the u bolts just come with standard nuts.I will just use lock tight and check for loose nuts until they get rusty.If you need trailer parts I have ordered every thing from bearings and races to suspension bushings and spare tire covers from etrailer and have not been disappointed with any thing. 389286



- SP01-160
by:

Fit my trailer axel just right. Just what I needed to install my new leaf springs. 386023



- SP01-160
by:

It looks good, thanks for the fast service I will be putting it on tonight on my boat trailer. 384904



- SP01-160
by:

Good part. 382459



- SP01-160
by:

Great service and fast shipping.Quality product. 375776



- SP01-160
by:

Another great quality part 360852



- SP01-160
by:

Exactally as offered. 353326


Comments

Working out great

Mike r - 03/16/2018

35974

- SP01-160
by:

Made it easy to attach my upgraded springs, no more tire rubbing with regular loads! 343295



- SP01-160
by:

They had what I needed where [retailer] did not, the prices are low and I got my order within 5 business days. Awesome service! 339285



- SP01-160
by:

Good quality product, good delivery tim e. 337673



- SP01-160
by:

I have a huge old miley horse trailer that has seen better days and all of the leaf springs, bearings, etc needed to be replaced, It wasnt like I could go into a name brand parts store to get them either. So when my husband told me he found everything he needed on etrailer.com, I was relieved. I am very happy with the price and the delivery time. The fact that delivery was free was definitely a bonus because the parts were very heavy. I was a little worried about the condition of the parts when they came, the boxes were pretty beat up (very heavy) but so far I haven't found any problems. 325450



- SP01-160
by:

Perfect! Will always order here! Your delivery times and prices make it all worthwhile! 325361



- SP01-160
by:

Everything I've received from ETRAILER has "fit like a glove". Excellent service, products and price. Dave 322663



- SP01-160
by:

No issues, all has performed as expecte d. 320668



- SP01-160
by:

The product is excellent, this one work excellent on my project . 317326



- SP01-160
by:

Good quality 315814



- SP01-160
by:

Great product, as described, description of the measurements fit right on. I would & have recommend E-trailer to friends. 311161


Comments

Fit and works as described, Im happy with the product.

Rich M - 10/27/2017

30121

- SP01-160
by:

GOOD PRODUCT NO PROBLEMS 310916



- SP01-160
by:

These things are built to last! Very strong and exactly the part I needed to complete a trailer a rebuild I am currently working on. Shipping was much faster than anticipated so it will be a couple days before I am ready to install them. 309153



- SP01-160
by:

Fast delivery everything was as ordered. 308819



- SP01-160
by:

Great product shipped on time 308721



- SP01-160
by:

Fast Shipping. Exactly as advertised, good product. 303713



- SP01-160
by:

Erika was super helpful. Really helped me get the correct parts the first time. I will always use etrailer from now on!! A+++ in my book! 296965


Comments

SUPERB!!!!!!!! Erika at E-Trailer is AWESOME!!!!

Ed R - 09/17/2017

28268

- SP01-160
by:

Received order complete and on time. Will purchase from them again. 292354



- SP01-160
by:

PRODUCT WAS JUST WHAT I WAS LOOKING FOR. IT DID THE JOB WELL AND I WOULD PURCHASE TRAILER PARTS AGAIN WHEN NEEDED FROM YOUR CO. DON 290540



- SP01-160
by:

Installed 2 new slipper leaf springs that had broken on a 1977 Skipper-B boat trailer. Total time for installation was less than 2 hours, product is as good as new. 290341



- SP01-160
by:

Perfect product. Fit my trailer perfect. 286439



- SP01-160
by:

works 283598


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Show More Reviews

Ask the Experts about this Redline Trailer Leaf Spring Suspension
Do you have a question about this Trailer Leaf Spring Suspension?


  • Are 5-3/4 Inch U-Bolts Long Enough for a 3 Inch Tall Axle and Slipper Spring # SP-040275
  • The internal length of u-bolts # SP01-160 is 5-3/4 inches so you would not subtract 9/16 inches from that length. The u-bolt plate # 117594-G is 3/16 inches thick. The spring stack for # SP-040275 I just measured and it is 1-7/16 inches thick. Adding in the 3 inch height of the axle and the total comes to 4-5/8 inches. So all of these parts will fit your trailer axle.
    view full answer...

  • How to Pick Out Replacement Slipper Springs for a Boat Trailer with 2 inch Square Axles
  • In order to pick out springs you need to remove the load on the trailer so that the leaf spring is not flattened out at all. You will want to measure from the center of the eye of the spring to the center of where the slipper spring contacts the hanger. If that distance is 26-1/4 inches and the capacity of the axle is 4,100 lbs the # SP-264275 would fit and work well. The bushing of this spring is 9/16 inch in diameter. You will want to use a 9/16 inch diameter bolt so you can either...
    view full answer...

  • U-bolts for Gooseneck Trailer hitch Safety Chains
  • U-bolts for gooseneck hitches have springs on them so that the retract down when not in use. U-bolt kit # C113 sounds like it would work for you with the measurements you have provided. The u-bolts are 2 inches wide on center and the springs, washers, and nuts are included.
    view full answer...

  • Need a 3-Leaf Slipper Spring Kit for my Boat Trailer with 2 Inch Square Axles
  • In order to determine which 3-leaf slipper springs will fit, you will need to take a few measurements of the current springs on your boat trailer. I am including a diagram that shows which measurements are needed. The diagram also includes the measurements of the two 3-leaf springs that we have available. Compare your measurements to those to see if we have a match. 3-Leaf Slipper Springs for 1,500 lb Trailer Axles, # SP-178275 3-Leaf Slipper Springs for 3,000 lb Trailer Axles, # SP-039275 Although...
    view full answer...

  • Galvanized Square U-Bolts For 2-Inch Wide Trailer Frames
  • For a galvanized (zinc plated) square u-bolt of dimensions similar to yours we offer part # UBZC12X212X525 which measures 5-1/4-inches long, 2-1/8-inches wide at the inside and 1/2-inch in material diameter. This does not include the 1/2-13 nuts. We also offer square u-bolt that are closer to your dimensions but these are not galvanized. Part # SP01-160 is a set of two u-bolts and four nuts. These u-bolts are 9/16-inch diameter, 5-3/4-inches long and 2-1/8-inches wide at the inside....
    view full answer...

  • Replacement U-Bolt Plate for a Trailer with 2 Inch Square Axle
  • For a 2 inch square axle you are going to want u-bolt plate # TRTP200175. The hole spacing on center is 2-5/8 inches by 2-3/8 inches. For matching u-bolts go with # SP01-160. They have a 9/16 inch diameter. I have included a link to a video review for you for the u-bolts. It does sound like you will need to replace some existing components if they do not match up. I do not recommend modifying anything because that can weaken those items. Any welding should be performed by a qualified professiona...
    view full answer...

  • Leaf Springs, Hanger Kit, and U-Bolts for a 2 Inch Square Trailer Axle
  • Since you do not know the capacity of the trailer axle then you can't go by the capacity of the springs. If the axle is rated for 2,000 pounds and the springs for a 3,500 pound axle then you would still be limited to 2,000 pounds. If you have the inner and outer bearing numbers then that will help to determine what the likely axle capacity is. Since you want to replace the hangers as well as the springs then it doesn't matter which springs you choose. If the axle does end up having...
    view full answer...

  • Replacement U-Bolt and Plate for Trailer with 2 Inch Square Axle
  • For a 2 inch square axle you are going to want u-bolt plate # TRTP200175. The hole spacing on center is 2-5/8 inches by 2-3/8 inches. For matching u-bolts go with # SP01-160. They have a 9/16 inch diameter. I have included a link to a video review for you for the u-bolts.
    view full answer...

  • Replacement Leaf Springs and U-Bolts for a 1987 Shore Line Boat Trailer
  • Thank you for submitting the photo of your setup. Considering the height of your axle and the amount of clearance you currently have from the axle to the frame of your trailer you wouldn't have enough room to put your axle above the leaf spring. You would barely have a couple of inches of suspension travel. For U-bolts you would want the part # SP01-160 and then for plates you would want the # 117594. Based on the dimensions of your current slipper springs the # SP-040275 that you...
    view full answer...

  • What is the Internal Width of Square Trailer U-Bolts # SP01-160
  • I went out to the warehouse and measured the internal width of Square Trailer U-Bolts # SP01-160. They are 2-1/8 inches wide on the inside. They are designed for a 2 inch square axle using 1-3/4 inch to 2 inch wide springs.
    view full answer...

  • How To Choose The Correct Leaf Spring U-Bolt Diameter Size On A Trailer Axle
  • You will want to choose the diameter size of U-Bolts you need by the axle type (round, square) and the axle diameter. The Redline 2 Inch Square Trailer U-Bolt, part # SP01-160, you have referenced is for a 2 inch square axle. It is a 9/16 inch diameter bolt. The 9/16 inch diameter U-Bolts are used on 1-3/4 inch and 2 inch square axles, 2-1/2 inch round axles, 3 inch round axles, and 3-1/2 inch round axles. I am including a link to a page of the available 9/16 inch diameter U-Bolts. The...
    view full answer...

  • Is Redline Square Trailer U-Bolt Kit # SP01-160 Galvanized
  • The Redline Square Trailer U-Bolt Kit # SP01-160 is not galvanized but we do offer galvanized u-bolts for 2-inch square axles. Part # UBZC12X212X525 is a 1/2-inch diameter galvanized u-bolt for 2-inch square axles and part # UBZC716X212X400 is 7/16-inch diameter. We do not have stainless steel versions. All of the spring seats we offer are for round axles and can be seen on the included link.
    view full answer...

  • Using Nylon Lock Nuts On 2 Inch Square Trailer U-Bolt SP01-160
  • For the 2 inch Square Trailer U-Bolt, part # SP01-160 you purchased, you can use nylon lock nuts that would work for a 9/16 bolt.You would want to make sure you use nuts of equal strength and that they match the thread and size.
    view full answer...

  • Recommended Torque Specifications for U-Bolt # SP01-160 in a Slipper Springs Trailer Setup
  • Since the # SP01-160 u-bolts are 9/16 inches in diameter the torque rating is from 65 ft/lbs - 95 ft/lbs. I have linked a Help Article on Slipper Spring Trailer Suspension System Review to this page that lines out the torque ratings of the different diameter u-bolts for you to check out. I linked all the parts you mentioned to this page for your purchasing convenience.
    view full answer...

  • Thickness of 4 Leaf Slipper Spring for 2000 lb Axle Part # SP01-160
  • The 4-Leaf Slipper Spring for 2,000-lb Trailer Axles is 1.04 inches thick at the thickest point. If you need some replacement U-Bolts, we offer them. The part # is SP01-160.
    view full answer...

  • Leaf Spring and U-Bolts Recommendation for a Utility Trailer with 2 inch Square Axles
  • Sounds like you have 2 inch square axles on your trailer, for a set of U-bolt you would want part # SP01-160 and then for a U-bolt plate you would want the part # 117594. Now to pick out the correct springs you will want to first find out how much capacity your trailer and axles are rated for. This should be stamped on a plate near the coupler where the VIN is located. If it was a round axle I could give you a pretty good ball park of what the capacity would be, but square axles don't...
    view full answer...

  • How to Increase Ground Clearance with Slipper Springs.
  • I can help you figure out how to get more ground clearance from your trailer. All of our over under kits have only been tested on a double-eye spring setup, these are secured on both ends unlike slipper springs which are not. I would worry that it could become unsafe since the weight of the trailer was pulling on the axle and once you switch the location of it all the weight will now be pushing down on the rectangular axle. While we don't have a specific over under kit for rectangular...
    view full answer...

  • U-Bolts to Attach Bunk Brackets to Trailer with 3 inch Frame
  • For a 3 inch trailer frame like you said you have we have the U-bolts part # 7163183UB which will work great for attaching roller bunk brackets like the part # CE10000G-4. The inside portion of the U-bolt is 3-1/8 inches wide by 3 inches long.
    view full answer...

  • Replacement Leaf Springs, Equalizers, and Shackle Straps for a Magic Loader Boat Trailer 6K Axles
  • There is not an exact size leaf spring, equalizer, and shackle strap length that must be used on your trailer but they do all have to be compatible with each other. That said, the measurements that you provided are fairly standard so I recommend using the Tandem-Axle Trailer Hanger Kit part # APT5 with the 5-Leaf Double-Eye Spring part # SP-111275 (4). The leaf spring hangers can be discarded but it will be more cost effective to obtain the kit. These components will have the right combination...
    view full answer...


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




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Info for this part was:

Photos by:
Theodore B
Expert Research:
Jackie C
Expert Research:
Michael H
Expert Research:
Jeff D
Expert Research:
Jameson C
Video Edited:
Joshua S
Updated by:
Adele M
Expert Research:
Adam R
Installed by:
Cole B
Expert Research:
Jeffrey L

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