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  1. Boat Trailer Parts
  2. Redline
  3. Roller and Bunk Parts
  4. U-Bolts
  5. 4-1/4 Inch Long
  6. Zinc-Plated Steel
Trailer Square U-Bolts (Qty 2),2-1/4" x 4-1/4" x 3/8"

Trailer Square U-Bolts (Qty 2),2-1/4" x 4-1/4" x 3/8"

Our Price: $21.86
Boat Trailer Parts
Orders above $50 qualify for Free Shipping
Shipping Weight: 0.75 lbs
Trailer Square U-Bolts Qty 22-1/4 Inch x 4-1/4 Inch x 3/8 Inch
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  • All Info
  • Reviews (38)
  • Q & A (0)
  • Photos
  • Why etrailer?

Redline Boat Trailer Parts

  • Roller and Bunk Parts
  • U-Bolts
  • 4-1/4 Inch Long
  • Zinc-Plated Steel
  • 2-1/4 inch Wide
  • 3/8 Inch Diameter
  • Redline

Trailer U-bolts ideal for boat, pwc, and snowmobile trailers.

  • Zinc Plated to resist corrosion
  • Square bend simplifies attachment of hardware to square trailer frames
  • Dimensions:
    • A: 2-1/4"
    • D: 3/8"
    • L: 4-1/4"

cargo control bolt display

382144UB Trailer Square U-Bolts (Qty 2),2-1/4" x 4-1/4" x 3/8"

Item # 382144UB

Customer Satisfaction Score:

Customer Reviews

Trailer Square U-Bolts (Qty 2),2-1/4" x 4-1/4" x 3/8" - 382144UB

Average Customer Rating:  4.7 out of 5 stars   (38 Customer Reviews)


Exactly what I needed to attach my teardrop tongue box


I had an emergency need, after attempting some modifications to a new canoe trailer, and eTrailer stepped up and quickly turned around my order the same day, enabling me to take care of my issue and be on the road as planned. THANK YOU!!!


The product was exactly what I ordered and matched the website's photos perfectly. The brackets I ordered are durable, and of excellent quality for my application.

When I placed my online order, the web site showed that the quantity I wanted was in stock, but that turned out to be incorrect. To their credit, they immediately called me to let me know, shipped what they did have in stock, and followed up every few days with status on the order balance. I was not charged until my order had been filled, and all of the brackets were in my possession. I highly recommend this company.

What kind of company contacts you one year after the sale to see if you are still satisfied with their product? etrailer did. Great customer service and yes, the brackets I bought from them were put to immediate use, still look brand new and are as durable as they were on the first day.
James L - 09/20/2019


Looks to be a great set of u bolts and they even came with nylon locking nuts whereas all the other bolts I looked at only came with split lock washers. Thats a real plus. Looked a lot of other places before I could locate the proper size. Thankfully etrailer stocked them.


I used these U-bolts not on a trailer but to secure the front spring on my '32 Ford. 2-1/4" is the perfect width to fit the cross-member of the frame, and 4-1/4" is the length I needed to accommodate spacers between the spring and the frame for additional ground clearance. They worked out perfectly for this application.


These square ubolts are exactly what I needed. They appear to be durable and I like that they come with washers and nylock nuts. Faster delivery than expected. Very satisfied with this order. ??


These were bought to replace the same rusted parts on my trailer.
I had trouble finding them, even on your site, but finally came across them while searching for spring seats for my new axle. They fit perfectly, just what the doctor ordered.


The u-bolts I purchased are nice but I think all sizes should be available in stainless steel and come with bolt plates. As for customer service it could not be any better! Tori and Leslie both went above and beyond to make sure I got what I needed to complete the job. These ladies should be given raises for what they probably have to put up with on a daily basis! Thanks...


Perfect product for my trailer rebuild. Great fit and finish.


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


the product was exactly what i needed and expected. i received the product earlier than promised. great experience. will deal with again.


These were the perfect fit for my boat trailer. I couldn’t find this size anywhere else, so i’m thankful that I found them on etrailer


Product seems pretty good. Really the only thing I don't like about them is it doesn't have any type of max torque spec on the package. I would guess about 30 foot pounds based on other online research. It would just be nice to have it on the package.


Great company to order from. Even during these difficult times everything was handled professionally and quickly. Thanks!


Prompt shipping and product was exactly as advertised. Will definitely order from etrailer again.


They arrived exactly as described and work perfectly. This is a hard size to find and am really glad etrailer has them!


Used to mount a winch stand, worked perfectly. Good product at a fair price.


Fantastic service as always! Thank you! jf


Great quality and worked perfectly!


Product is as described and worked perf ectly


I ordered wrong part, my fault. I am ordering new part. Can not use this one, but will save for future use.


Product was exactly what I needed. I just didn't notice the quantity in the description. I only needed 2 total which I see now is in the Description there for I ordered 2 and now I have 4. Darn it, I wished I looked a bit more closely.


These U-Bolts are exactly what i needed and fit perfectly. The product and service were both great.
Thank you guys


Just what I needed. So many of these are 2 1/8. The 2 1/4 was only available here that I could find. Worked out great for what I needed


As described .... wish they had the plate to go under the beam that they are attached to, but I had some that I could use.

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Info for this part was:

Employee Laura H
Updated by:
Laura H

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