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

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Trailer Leaf Spring Suspension

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UBZC12X212X525 - 5-1/4 Inch Long Redline Trailer Leaf Spring Suspension
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Product Images

Videos


  • U-Bolts
  • Axle Mounting Hardware
  • Square Axle - 2 Inch
  • 5-1/4 Inch Long
  • 3500 lbs
  • Redline
  • 1/2 Inch Diameter
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 800-298-8924 for expert service.


  • All Info
  • Reviews (67)
  • Q & A (7)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Trailer Leaf Spring Suspension - UBZC12X212X525

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   (67 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:

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. 599260



- 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. 668502



- UBZC12X212X525
by:

Order filled quickly and delivered on time. Just what I needed. 641977



- UBZC12X212X525
by:

Great quality item, shipped fast, excellent communication. A++++ 621878



- 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. 617847



- UBZC12X212X525
by:

Am using these for a structural application, they arrived as advertised. Seem to be high quality. Deliveertry was quick, price was also very competitive 614917



- UBZC12X212X525
by:

So happy the product arrived 2 days ahead of schedule. They are perfect and just what I had ordered. Would order again from you for items we are unable to find in our location. 612798



- UBZC12X212X525
by:

Rebuilt trailer suspension, should be good for another 20 years. One of my old springs snapped. 610802



- UBZC12X212X525
by:

Just as ordered, quickly shipped 609526



- UBZC12X212X525
by:

good 601614



- UBZC12X212X525
by:

Just what I needed, on time and under budget.. what more could anyone ask.. 584536



- UBZC12X212X525
by:

Super customer service, will continue to do business. 581247



- UBZC12X212X525
by:

Just what I needed and at a good price 576185



- UBZC12X212X525
by:

Very beefy u bolts definitely makes me feel confident using these to hold my boat axel on. 562069



- UBZC12X212X525
by:

A+++++ 560226



- UBZC12X212X525
by:

it fit just right. 555656



- 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. 541127



- UBZC12X212X525
by:

Fast shipping only place I could find the right size I wasn't sure if it came with nuts and washer I don't see it in the description or the pic I got some for it any ways and the pic was right on but I would have like to seen it in writing to know for sure great service tho keep up the good work 526678



- UBZC12X212X525
by:

As advertised. Quick delivery and great service. 526418



- UBZC12X212X525
by:

great response 519349



- UBZC12X212X525
by:

The service was outstanding and a very quick turnaround on order. 504922



- UBZC12X212X525
by:

Fits trailer perfect. Good quality! 501341



- UBZC12X212X525
by:

Perfect fit , great product 499321


Comments

The products work great , good quality stuff I dont foresee any problems ever with the parts

Bob - 04/23/2019

54320

- UBZC12X212X525
by:

Exactly what I needed,as ordered. Easy to purchase on line and arrived earlier than promised. Great service-thank you! 469520



- UBZC12X212X525
by:

sturdy, easy to use, just don't forget new nuts. sure beats wrestling with old rusty stuff! 453629



- UBZC12X212X525
by:

Its been a year and they haven't broke. 452591



- UBZC12X212X525
by:

Fits perfectly, good craftsmanship, good quality, real fast delivery, would recommend to anyone else! 444758



- 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 409904



- UBZC12X212X525
by:

Troy H is the Best. Good job. 401830



- UBZC12X212X525
by:

Fit my 5 star trailer perfectly. Hope they hold up in and out of salt water 397719



- UBZC12X212X525
by:

Product delivered as expected. Good quality and has held up well! 396449



- UBZC12X212X525
by:

Perfect fit.........excellent quality.......fast shipping........Highly recommended 392238



- UBZC12X212X525
by:

once again, Superior Service for 100% p roduct 389791



- UBZC12X212X525
by:

Very fast shipping, awesome product. Buy with confidence. I'm very happy with their service. Thank You. 389002



- UBZC12X212X525
by:

I ordered these a day after I had ordered some other bolts and they all came at the same time, seems like it was just 3 days. These, as everything else I order fit perfectly and now I'm back on the road. 384529



- UBZC12X212X525
by:

Ups beat the box up good. Was partly split open an one u_ bolt was missing. U bolts were loose in box, they should have been secured all together or a smaller box inside big box. Damage ups fault, packing your fault. No big deal, should have took pics but ! 383020



- UBZC12X212X525
by:

Exactly what I needed, priced right, in stock, quick shipping! 366267



- UBZC12X212X525
by:

Heavy duty and great fit... good business and fast shipping... 364342



- UBZC12X212X525
by:

I have not installed it yet ,waiting for better weather . I was impressed when i ordered it sunday morning and it shipped sunday afternoon . great service 364526



- UBZC12X212X525
by:

just wish you had a kit with these bolts along with nuts and lock washers. fit was fine. 352304



- UBZC12X212X525
by:

So far so good.Right size and fit.I would buy this /these products again from etrailer.com. 355447



- UBZC12X212X525
by:

Good Store! Good Merchandise! Well packed for shipping! I'll come back If and when I need trailer parts! 352408



- UBZC12X212X525
by:

My order arrived in the time frame projected. I was kept well informed of the shipment status. The items are very good quality and well packaged. I will order from etrailer again. 347099



- UBZC12X212X525
by:

As shown 341781



- UBZC12X212X525
by:

Great value and was shipped fast and packaged well! 333927



- UBZC12X212X525
by:

I received my product on time. Thank Yo u. 335966



- UBZC12X212X525
by:

As described, great quality! ?? 330540



- UBZC12X212X525
by:

One year later and no signs of rust. Used on a boat trailer. Fully submerged in salt water multiple times. Great product!!! 325018



- UBZC12X212X525
by:

Nice product, fast delivery, I would order again if needed. 323963


Comments

Excellent, Allowed replacement of Axle with new springs to work out very nicely, I gor to weld axles onto the 2 heavy square tubing and just bold on the springs.

Tom B - 12/11/2017

31669

- 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. 315877


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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?


  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...


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




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Info for this part was:

Edited by:
Lindsey S
Expert Research:
Jameson C
Updated by:
Adele M
Expert Research:
Adam R
Video by:
Kathleen M
Photos by:
Jim W
Installed by:
Cole B
Photos by:
Sam P
Written by:
Lisa S
Updated by:
Sarah W

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