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  1. Boat Trailer Parts
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  3. Roller and Bunk Parts
  4. U-Bolts
  5. 4 Inch Long
  6. Zinc-Plated Steel
Trailer Square U-Bolts (Qty 2), 2-1/8" x 4" x 7/16"

Trailer Square U-Bolts (Qty 2), 2-1/8" x 4" x 7/16"

Item # 7162184UB
Our Price: $25.55
Boat Trailer Parts
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Shipping Weight: 1.01 lbs
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Trailer Square U-Bolts Qty 2 2-1/8 Inch X 4 Inch X 7/16 Inch
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  • Reviews (30)
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  • Videos (1)
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Redline Boat Trailer Parts - 7162184UB

  • Roller and Bunk Parts
  • U-Bolts
  • 4 Inch Long
  • Zinc-Plated Steel
  • 7/16 Inch Diameter
  • 2-1/8 Inch Wide
  • Redline

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

  • Zinc Plated to resist corrosion
  • Square bend simplifies attachment of hardware to square trailer frames
  • Dimensions:
    • A: 2-1/8"
    • D: 7/16"
    • L: 4"

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7162184UB Trailer Square U-Bolts (Qty 2), 2-1/8" x 4" x 7/16"

Video of Trailer Square U-Bolts (Qty 2), 2-1/8" x 4" x 7/16"

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

Video Transcript for Review of Redline Boat Trailer Parts - Trailer Square U Bolts With Hardware - 7162184UB

Hi, everybody. Andy here with And today, we're gonna take a quick look at these trailer square U-bolts. Now, these multipurpose U-bolts are intended for use on trailers to help secure brackets, mounts, and cargo to your trailer's frame. These are zinc plated to resist corrosion. And you're gonna get everything that you see here before me.

You're gonna get two U-bolts, four washers, and four nylon lock nuts. And let me go ahead and just give you some overall measurements here. We're gonna be measuring the inside of this U-bolt. So, the inside length, we're sitting right at four inches long. And the inside width, we're sitting right at 2 1/8 inches.

And then this is gonna be 7/16 of an inch in diameter. And the threaded portion is gonna be measuring right at two inches long. And that's gonna conclude our brief look today. I do hope that it was helpful for you. Again, my name is Andy.

Thank you for joining me..

Customer Satisfaction Score:

Customer Reviews

Trailer Square U-Bolts (Qty 2), 2-1/8" x 4" x 7/16" - 7162184UB

Average Customer Rating:  4.7 out of 5 stars   (30 Customer Reviews)


Quality products, timely delivery!!


Great prices, and they have what I need.


does not fit 2 1/2" , as said.. need to return please adv returning info.

These U-bolts measure two and one eighths wide. We do not carry a boat trailer U-bolt that measures two and a half inches.
-- Etrailer Expert Heather A - 02/25/2022


These fit my Belmont trailer frame perfectly. The width was just right and the length was spot on for a 2X side.


etrailer nailed it. I purchased mounting U-bolts, AMERICAN made Dutton-Lainson hand winch and winch cable. Orders were shipped and received on time . Easy website to navigate and purchase products.
I would recommend them and the products they sell to anyone. Very satisfied!


Exactly the part I needed to fabricate the fender mounting bracket to fit my old trailer


I have rebuilt three boat trailer and all parts came from etrailer.


The U-bolts were fine as were the nuts but was missing three wahers from one pack. Not a big deal. Fast shipping.


Great product and fast delivery as always. Thank You


Exactly what I expected. Quality materials and shipped within a week.


Very rapid shipment. Excellent pricing. Products were of good quality.


Promptly delivered exactly as ordered.


It was the correct size and fit for what I needed. I just put it on. Time will tell how well it will hold up, but it appears great.


replaced tounge needed Shackel bolts use in saltwater all the time still solid..


Everything I needed to fix my has out preformed my expectations. Thank you


Came in a couple days exactly as ordered and have installed them already, no problems. Well made to size ordered.


exactly as ordered


Thank you for having the proper size I needed, they are mounted and are going to work perfectly. I appreciate your help and speedy processing. Be safe and cheers!!



They do the job. Nice product.


Good quality. Came quickly.


Looks well made,shipped fast.


Arrived very quickly packaged good and nice price


Used the U-bolts to make a hitch clamp for my 2" hitch. Worked great.



Show More Reviews

See what our Experts say about this Redline Boat Trailer Parts

  • Replacement Shackle Strap and U-Bolt for Boat Trailer Bunk Brackets
    You should be able to measure the old shackle strap and u-bolt to get the correct size replacement. Measure the center to center distance between the holes and the diameter of the holes on the shackle strap. Shackle strap # CE14103G that you have referenced measured 2-3/4 inches from hole center to hole center and the diameter of the holes is 9/16 inches. A u-bolt can probably be found easily at a local hardware store. Just take the old bolt with you to compare. The u-bolts you referenced...
    view full answer...
  • Could Trailer Square U-Bolts # 7162184UB Be Used to Secure 2 inch Square Pipe
    Yes, the threaded portion of the Trailer Square U-Bolts # 7162184UB that you referenced is long enough to tighten onto a 2 inch square pipe.
    view full answer...
  • U-Bolts to Mount Bolster Brackets to a 2-1/4 Inch Trailer Frame
    Your best option is going to be u-bolt set # 7162184UB. Since these are 2-1/8 inches wide you will likely need to bend them some to fit a 2-1/4 inch frame.
    view full answer...
  • Replacement Double Eye 4 Leaf Spring For Single Axle Trailer
    I have two sets of springs that are a 4 leaf spring that'll work for you. They are for two different weighted axles, a 3,500 lb axle # SP-212275 and a 6,000 lb axle # SP-221275. Both measure 25-1/8 inches long which is a bit shorter, but this is the measurement without any weight on the springs. I've included a diagram with more measurements so you can double check! These both do not come with the mounting hardware. You could use the same hardware or you can use one of these # 7162184UB. I've...
    view full answer...
  • Are There Galvanized and Stainless Steel U-Bolt Options Available
    Yes, we do have stainless steel and galvanized square u-bolts available. The CE Smith U-Bolt - Stainless Steel # CE15501A has the same 4" Long x 2-1/8" Wide x 7/16" Diameter measurements as the Trailer Square U-Bolts # 7162184UB you were looking at. I have also listed all of our galvanized and stainless u-bolts below for you. Galvanized: - CE Smith U-Bolt - Galvanized - 4-1/16" Long x 1-9/16" Wide x 1/2" Diameter # CE15282GA - CE Smith U-Bolt - Galvanized - 3-9/16" Long x 1-9/16" Wide...
    view full answer...

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Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Laura H
Updated by:
Laura H
Employee Andy C
Installed by:
Andy C

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