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

Trailer Square U-Bolts (Qty 2), 3-1/8" x 4" x 7/16"

Item # 7163184UB
Our Price: $24.73
Boat Trailer Parts
Shipping Weight: 1.12 lbs
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  • Reviews (40)
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  • Videos (1)
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Redline Boat Trailer Parts - 7163184UB

  • U-Bolts
  • 7/16 Inch Diameter
  • 4 Inch Long
  • Zinc-Plated Steel
  • 3-1/8 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: 3-1/8"
    • D: 7/16"
    • L: 4"

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7163184UB Trailer Square U-Bolts (Qty 2), 3-1/8" x 4" x 7/16"





Video of Trailer Square U-Bolts (Qty 2), 3-1/8" 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 - Roller and Bunk Parts - 7163184UB

Hello everybody, this is Jeff at etrailer.com. Today we're gonna take a look at the four inch long by 7/16 inch diameter square U-bolts for square frame trailers. This is for a quantity of two bolts. Now, these trailer U-bolts are ideal for boat, snowmobile, and standard utility trailers. The square bend design of the U-bolt simplifies attachment of hardware to your square trailer frame. The parts are zinc plated to resist corrosion, and it does include the two U-bolts, the four flat washers, and the four nyloc nuts.

A few dimensions on this: we mentioned the four inches. The four inches will be measured on the inside to the end of the U-bolt. There's your four inch measurement. The inside dimension is three and 1/8 inches, and the diameter of the U-bolt, again, is 7/16 of an inch. But that should do it for the review on the four inch long by 7/16 of an inch diameter square U-bolts for square frame trailers..

Customer Satisfaction Score:


Customer Reviews

Trailer Square U-Bolts (Qty 2), 3-1/8" x 4" x 7/16" - 7163184UB

Average Customer Rating:  4.8 out of 5 stars   (40 Customer Reviews)


by:

I have an older EZ loader boat trailer and these worked perfect with the rest of the items available. Very happy with the products and service.



by:

Before and after pics

Greg

5/29/2019

Everything is perfect.



by:

Everything came in as advertised. Purchased CE Smith bolsters, u-brackets, lag screws and carpet. Added two bunk boards to my Lowe trailer (Karavan). Only had two boards and I wanted extra to support the weight of the boat. Everything assembled easily. My boat loads easier and trailers better. Plus I have the piece of mind of having 4 boards vs 2.



by:

After several attempts at finding the right clamps for my Surco cargo basket, we have a winner! The ones that Surco recommended for my Explorer did not work and they did not have alternatives. Amy was a tremendous help and even had the U bolts sent to her to verify the size before I ordered it. She also found the right size of shackle strap I needed to make this work for me! Thanks Amy and etrailer!!



by:

new hardware and fresh rubber for a boat trailer holding a very old boat. parts arrived early and fit like OEM. If I need trailer parts ever again I will purchase them here.



by:

Parts were as advertised and were a perfect replacement for the parts on my trailer. I was pleased to find the parts came with washers and nylon insert lock nuts.



by:

Wish these were stainless however they are tge correct part to hold down a section of trailer. Being a bit thicker would be longer lasting. Now to receive the correct shackle.



by:

I received my order promptly and all the nuts and washers were packaged with each item. Customer service was excellent and I will tell all my friends. I haven't installed the items purchased but don't expect any problems due to their excellent quality. I highly recommend etrailer.com.



by:

The product I needed was not a common part. But Etrailer had it in stock, at a reasonable price. Product was shipped immediately with the standard shipping selected. Great vendor... would do business with them again, without hesitation!



by:

Parts fit well, I have use ETrailer in the past, they always deliver.



by:

I found what I needed on this site. Definitely will be returning for any other trailer parts.



by:

The items ordered were just as described and arrived in a very timely manner. Very pleased to order from eTrailer and will do so again as needed.



by:

Sturdy, and the right fit for my trailers configuration.



by:

Fit perfect and was good replacement for a rotted bolt.



by:

perfect fit ,only probably was package open and parts spilled out but all there



by:

Parts were exactly what I needed, time will tell how they hold up with corrosion. I probably should of used 2x6 instead of the 2x4 bunks, but there was nothing wrong with these bunks. Time will tell how they hold up.



by:

The U bolts shackle straps I ordered worked great and were high quality parts. I received my order faster than was promised. I will defiantly use these guys again.



by:

They should work when I get the chance to install them. The weather needs to get better so I can install them outside.



by:

Not much to say - great quality parts at a good price. Ordered this with other items for a nice one stop shopping experience.



by:

Excellently constructed pieces. Service was excellent.



by:

Received what I ordered in a timely manner, product is as advertised and exactly what I needed.



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by:

Exactly as described. Thanks



by:

Worked well


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See what our Experts say about this Redline Boat Trailer Parts

  • Grade of Steel Used in the U-Bolt Kit # 7163184UB
    The Redline U-bolts we carry like the part # 7163184UB are Grade 5.
    view full answer...
  • Will the Stromberg Carlson Bumper Mounted Clothesline Work W/ A 3" Wide Bumper
    No, the Stromberg Carlson Bumper Mounted Clothes Line for RVs # CL-100 will not work because the U-bolts that secure the clothesline to the bumper are going to be too wide because they will only work with 4" square bumpers. You could improvise a bit and use the Trailer Square U-Bolts # 7163184UB instead, however you're going to have to drill new holes into the bit where the original U-bolts would've gone.
    view full answer...
  • Could U-Bolt # 7163184UB Fit Over 2x4 or 2x6
    The inner width of the U-bolt part # 7163184UB that you referenced is 3-1/8 inches. Since 2x4 boards are actually 3.5 inches long this would not fit the board width-wise. Length wise it would fit both sizes. For width you'd instead need the part # CE15260A.
    view full answer...
  • Would the Single Axle Trailer Fenders # PF11X35W-2 fit on an EZ Loader Trailer with 15 in Wheels
    The Single Axle Trailer Fenders # PF11X35W-2 you referenced are designed to fit 13-15 inch wheels so it should fit your wheels. The fenders are 11-5/16 inches wide by 45 inches long by 13 inches tall, you will need to compare those dimensions to your setup to see if they will be compatible. I also attached a picture that shows how the installation hardware installs on a trailer for you to check out. We offer two suitable u-bolts that might work for you, depending on the height of your...
    view full answer...
    Image 1 for
  • Mounting Instructions for Redline # PF11X35W-2 Fenders
    I do not have instructions, but I can explain how the fender brackets are used. The mounting brackets slide into the underside of the step on either side of the fender with the open end of the bracket facing downward. The fender secures to the bracket by running a bolt (not included) through existing holes in the fender into holes in the bracket. The flat top edge of the bracket attaches to the underside of the trailer frame using U-bolts that are not included. We offer two suitable u-bolts...
    view full answer...
    Image 1 for
  • How To Install Roller Bunks on a Malone Watersport Trailer
    In order to convert your Malone trailer from a roof rack on wheels to a full on boat trailer with roller guide-on's, I recommend using the CE Smith Roller Bunks for Boat Trailers part # CE27700 and CE Smith Bolster and Swivel Bracket Assemblies for Roller Bunks part # CE10003G-4. The crossbars and brackets will need to removed and then you can install the swivel brackets to the crossmembers and the bunk rollers to the swivel brackets. That said, you will still need u-bolts that match the...
    view full answer...
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Do you have a question about this Boat Trailer Part?


Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Laura H
Updated by:
Laura H

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