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CE Smith U-Bolts - Galvanized - 3-13/16" Long x 3-1/16" Wide x 1/2" Diameter - Qty 4

CE Smith U-Bolts - Galvanized - 3-13/16" Long x 3-1/16" Wide x 1/2" Diameter - Qty 4

Item # CE15283GA-4
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CE15283GA-4 - Galvanized Steel CE Smith Boat Trailer Parts
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These sturdy square U-bolts let you secure 2 double U-bolt bolster brackets or 4 standard bolster or bunk board brackets to your boat trailer's frame. Galvanized steel is durable and corrosion resistant. Hardware included. 1-833-496-1390 to order CE Smith boat trailer parts part number CE15283GA-4 or order online at etrailer.com. Free expert support on all CE Smith products. Guaranteed Lowest Price and Fastest Shipping for CE Smith U-Bolts - Galvanized - 3-13/16" Long x 3-1/16" Wide x 1/2" Diameter - Qty 4. Boat Trailer Parts reviews from real customers.
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  • Reviews (84)
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CE Smith Boat Trailer Parts - CE15283GA-4

  • Roller and Bunk Parts
  • U-Bolts
  • 3-13/16 Inch Long
  • Galvanized Steel
  • 3-1/16 Inch Wide
  • 1/2 Inch Diameter
  • CE Smith

These sturdy square U-bolts let you secure 2 double U-bolt bolster brackets or 4 standard bolster or bunk board brackets to your boat trailer's frame. Galvanized steel is durable and corrosion resistant. Hardware included.


Features:

  • 4 Heavy-duty square U-bolts let you secure brackets on your boat trailer
    • Works with 2 double U-bolt bolster brackets or 4 standard bolster or bunk board brackets
    • Designed for use with brackets that have 1/2" diameter mounting holes or 1/2" wide mounting slots
  • Galvanized steel resists rust and corrosion
    • Suitable for saltwater exposure
  • Includes mounting hardware
  • Made in the USA


Specs:

  • Quantity: 4 U-bolts
  • Inner width: 3-1/16"
  • Length: 3-13/16"
  • Bolt size: 1/2"-13
  • Thread length: 1-1/2"
  • Overall length: 4-5/16"


dimensions

Galvanized Steel

Galvanized steel parts are hot-dipped in zinc after being stamped. This creates a coating that is typically 3 mil to 5 mil thick. This thick, all-around coating allows galvanized steel products to provide years of use without rusting or corroding.



15283GA C. E. Smith Galvanized Square U-Bolts for Boat Trailer Brackets - Quantity 4




California residents: click here



Customer Reviews

CE Smith U-Bolts - Galvanized - 3-13/16" Long x 3-1/16" Wide x 1/2" Diameter - Qty 4 - CE15283GA-4

Average Customer Rating:  4.8 out of 5 stars   (84 Customer Reviews)

These sturdy square U-bolts let you secure 2 double U-bolt bolster brackets or 4 standard bolster or bunk board brackets to your boat trailer's frame. Galvanized steel is durable and corrosion resistant. Hardware included.

by:

Shipping box half open. More tape?? bolt package open not all lock washers included. Nothing major. I’ll get another one at Lowes


Comments
I will have our Customer Service team reach out to you.
-- Etrailer Expert Jenny N - 04/07/2022


by:

The U-bolts need to be threaded further up the bolt. It may work ok for larger sized boat trailers that have thicker rails. I have a 16 foot jon boat that has a trailer with rails that are thinner in depth. So matter which way I placed the bracket, the u-bolt would not tighten all the way down. I had to create a spacer to be able to tighten the bracket with the u-bolt. Threading the bolt further would solve the problem.




by:

Used these as part of a full boat trailer rebuild. They were sized perfectly and of very high quality. After a year of use these are performing excellently.




by:

They where easy to install... Heavy duty ... Worth every penny big to Etrailer...




by:

My jetski trailer needed new bunks and hardware, I called these guys to verify what I needed. They hooked my up with good quality parts. I do wish however they would have included the lag screws needed for the bunks.


Comments
Still great
Eric - 05/29/2017


by:

Bought several parts from eTrailer to complete this restoration and transformation of a 1958 trailer to suit my needs today. Couldn't have done it in only 4 days without the help from this great company with quality products!




by:

Great quality1 fast shipping




by:

Ordering was smooth and shipped out from ETRAILER was lightning fast.
U Bolt and Bolster bracket are heavy duty enough. They should screw down the swivel on bolster bracket a lot more because it was pretty annoying moving around while mounting it.
The guide rail bracket holes were a bit too close to the frame, making it difficult to use a ratchet
end wrench placement and removal difficult. Without using ratchet, it will take you several minutes to put a nut on just one.
Quality is good!




by:

Great products just wish the shipping end would of kept the box in better condition. Appreciate all the customer service I’ve received and will be using the company soon for another trailer!




by:

GREAT Customer Service!! Seth worked with me to get the exact size and type of bolts needed for the job. Prompt delivery and up to date tracking. This is how a business should handle their customers. Bolts are heady duty galvanized. Will easily replace the rusted bolts that hold the bunk board brackets.




by:

Completely updated the axle, suspension, and added roller bunks to my waverunner trailer. Have taken the waverunner in for the winter and back out for the summer one time. All components were great and the trailer rides really well!




by:

Very impressed with e trailer everything I ordered was received the way I wanted it everything works great rebuilt a boat trailer From the ground up very happy still tows down the highway no problems


Comments
The product is still working great !
Eric v - 08/22/2017


by:

All the parts came as ordered,very pleased with everything. Got the bunk boards mounted and my boat seems to sit on them as i expected. I purchased stainless steel lag bolts to attach the bunks to the brackets. Parts arrived UPS all packaged in a large box with lots of packing paper,loose items all wrapped nice so nothing got lost.




by:

etrailer has always delivered for me. I’ve ordered a wide range of items which get here on time and good quality. These 1/2” galvanized U bolts were perfect for my boat trailer rebuild!




by:

all expected parts arrived in excellent condition and as promised.
dimensional diagrams for the CE Smith Bolster & Swivel bracket would be helpful for choosing an accurate size.

Otherwise, I'm very satisfied with my order.




by:

bolted right up. Could not be happier.




by:

Good quality U-bolts and swivel bracket assemblies. They are not a direct fit for my Caulkins trailer. I will have to devise a tapered shim for the bolsters so that they will run parallel to the outside rails. I had not counted on a custom installation.




by:

Good quality product. Seems to be well constructed. All parts were included. The best part was not having to hunt down individual components when you can buy a complete set. Packaging was good. This will make installation of bolster brackets for my boat trailer a breeze. I would definitely buy from etrailer in the future.




by:

Service and follow up was phenomenal.




by:

The products purchased were solid and of good quality. I'm impressed.
We purchased a used Jon boat and are upgrading the trailer and boat to for our satisfaction. We would not hesitate to purchase other products for etrailer. The videos were very helpful and informative. If I can I will add photos of before and after, soon.




by:

Excellent quality and great price. Was thinking the U-bolts were a little high and I could save at walmart but I bought the recommended one from etrailer and I'm glade I did. Much higher quality and did not realize how heavy duty they needed to be. Great job etrailer!




by:

The parts came quickly, all well packed. The coating on them seems very good. Love the way the nuts and washers are packaged and ty wrapped to the u bolts. They should work out well.




by:

Excellent product, exactly what I was looking for. Thank you for sending it so quickly. Will definitely do more business with etrailer.com




by:

the products are of good quality, however the wait time was long. I was put back twice because they said the supplier of the parts had not shipped them in a timely fashion so I waited for 2 weeks extra for parts to arrive




by:

Great quality trailer hardware
delivered
before due date
all good



25
84
Show More Reviews

See what our Experts say about this CE Smith Boat Trailer Parts



  • Recommended U-Bolts for Bracket Replacement on Boat Trailer With 3x3 Frame
    For U-bolts for your 3" x 3" frame you will want something that is slightly larger. If the measurements were listed as exactly 3" it isn't going to fit. What you need is the CE Smith U-Bolts - Galvanized - 3-13/16" Long x 3-1/16" Wide x 1/2" Diameter # CE15283GA. These U-bolts are the right size for your frame with a 3-1/16" width. They come in various quantities depending on your needs. 2 Bolts # CE15283GA-2 4 Bolts # CE15283GA-4 8 Bolts # CE15283GA-8 I have attached a review video for...
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  • Recommended Bunk Brackets For Pontoon Boat Trailer
    If there is no flex in the bunks with the pontoon boat loaded, you should be fine with the 1/2 inch clearance. If you are possibly hitting the frame of the trailer when traveling I recommend replacing the bunk brackets with taller ones like part # CE10161GA. This bracket sits on top of the frame of the trailer and are 8 inches tall, and 5 inches wide with 4 mounting holes that are spaced 1-1/2 inches apart center to center. This will give you options to mount the bunks at the height you...
    view full answer...
  • Distance Between 1st & 3rd Bolt Holes of Replacement CE Smith Heavy Duty Vertical Bunk Bracket
    The distance from the center of the top bolt hole to the center of the third bolt hole from the top is 3 inches for the Replacement CE Smith Heavy Duty, Vertical Bunk Bracket # CE10162GA. These brackets are 10" tall x 5" wide and to install require 1/2" diameter U-bolts to such as the CE Smith U-Bolts # CE15283GA-4. I have added a link below to a video review for you to check out as well as a link to our selection of 1/2" diameter U-bolts if you also need those.
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  • Is Mounting Hardware Included with CE Smith Bolster and Swivel Bracket Assemblies, # CE10000G-4
    The CE Smith Bolster and Swivel Bracket Assemblies, # CE10000G-4, do not come with any mounting hardware. Because the brackets can be used for different size and type bunks they do not include the hardware because it would not cover all applications. The holes that attach the bunk board to the swivel bracket are 3/8 inches in diameter. To attach the brackets to the trailer frame you can use U-bolts such as # CE15283GA-2 which are 3-13/16 inches long, 3-1/16 inches wide, and have a 1/2...
    view full answer...
  • Which Replacement Bunk Brackets For Boat Trailer
    If you are wanting to use vertical bunk brackets like the CE Smith Heavy Duty, Vertical Bunk Brackets - 90 Degree - Galvanized Steel - 6" Tall - Qty 2 # CE10160GA-2, I recommend using them on the front and rear of the trailer. You will also need CE Smith U-Bolts - Galvanized - 3-13/16" Long x 3-1/16" Wide x 1/2" Diameter - Qty 2 # CE15283GA-2 to secure the brackets to your trailer frame. If you have a lighter boat and would rather have the bunk brackets that allow you to angle the bunk...
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  • U-Bolt Recommendation for the CE Smith Heavy Duty, Vertical Bunk Brackets # CE26233-34GA
    The correct U-bolts to go along with the CE Smith Heavy Duty, Vertical Bunk Brackets # CE26233-34GA that you referenced are the CE Smith U-Bolts # CE15283GA-4.
    view full answer...
  • U-Bolt Kit for Use with CE Smith Heavy Duty Vertical Bunk Brackets CE26233-34GA
    Along with CE Smith Heavy Duty Vertical Bunk Brackets # CE26233-34GA you can use the u-bolt kit # CE15283GA-4 which is shown in the linked video.
    view full answer...
  • How Do CE Smith Heavy Duty, Vertical Bunk Brackets CE26233-34GA Get Installed?
    You are correct. You will want to mount the longer 95 degree bracket of the CE Smith Heavy Duty, Vertical Bunk Brackets - 85 and 95 Degree Set # CE26233-34GA on the lower section of the angled crossmember on your boat trailer, and the 85 degree bracket on the higher section of the crossmember. In addition you will need 1/2" diameter U-bolts to secure the brackets to the crossmember. If your crossmember is 3" x 3" then I recommend the CE Smith U-Bolts - Galvanized - 3-13/16" Long x 3-1/16"...
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  • Recommended 10-Inch Bolster Brackets And Hardware For Boat Trailer
    We have bolster brackets with swivels and the hardware needed to install them but they are not available as a kit. For the brackets I recommend part # CE10001G-4. This includes 4 10-inch bolster brackets with the swivels. For the additional bolsters you said you need you can order part # CE10001G. These are sold individually. The hardware needed to mount the bolsters to your trailer I recommend is part # CE15283GA-4. This includes 4-U-bolts, washers and nuts. For additional U-bolts...
    view full answer...
  • Type And Size Bolts To Attach Swivel Bracket To Carpeted Bunk Board.
    For bunk brackets we have CE Smith Bolster and Swivel Bracket Assemblies # CE10000G-4 as well as others at different lengths. To attach the brackets to the trailer frame you can use U-bolts such as # CE15283GA-2 which are 3-13/16 inches long, 3-1/16 inches wide, and have a 1/2 inch diameter. Or you could use # CE15283GA-4 which is the same thing only it comes with 4 U-bolts instead of 2. These mounting slots, are a length of 2-3/4 of an inch. There is a width of a 1/2 inch spacing in...
    view full answer...
    Image 1 for
  • Availability of 7 Feet Long 2 x 4 Carpeted Bunk Boards for a Boat Trailer
    The longest carpeted bunk boards we currently offer is 6 feet in length. It's the CE Smith part # CE27840 and each 6-foot long 2x4 is covered in marine grade carpet. You can easily construct some bunks yourself. Go to your local lumberyard and get some yellow pine 2x4x10 boards. You can then purchase some of the marine-grade carpet we offer, like part # CE11372. You'll need one roll per bunk, which means you'll have some scrap left over, which you can utilize as needed for other projects....
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  • Can I Use Roller Bunks and Carpeted Bunk Boards Together on Boat Trailer
    I'll start off by saying that I've seen quite a few boat trailers that use a combination of rollers like the CE Smith Roller Bunks for Boat Trailers - 6 Rollers Each - 5' Long - 1,500 lbs - 1 Pair # CE27710 and a carpeted bunk like the CE Smith Carpeted Bunk Boards for Boat Trailers - 7' Long - 1 Pair # CE27845. The rollers definitely help if you're on a lot of shallow or steep boat ramps and combining the two gives you the best of both worlds, with the rollers on the bottom and boards...
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  • Brackets for Adding Additional Bunk Boards to Magic Tilt Galvanized Kayak Trailer
    The problem is that your bunks need to face a different direction than what standard boat trailers have so it's hard to have a solution since your setup is unique. That said I don't see why you couldn't use CE Smith Bolster and Swivel Bracket Assemblies # CE10002G-4 attached to the rails front to back on your trailer so that could could mount the bunks. For a U-bolt kit you could then use the part # CE15283GA-4 to secure the brackets.
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  • Can I Install CE Smith Bolster Swivel Brackets On L Shaped Open Cross Member
    The CE Smith Bolster and Swivel Bracket part # CE10001G-4 attaches to the boat trailer frame with U-bolts. The brackets are designed to install on the inside of the cross member where the bunk boards would be on the frame. I recommend to use U-bolts part # CE15283GA-4 to install the brackets on the 3 inch channel cross member. I have attached a photo of what the install looks like on a trailer like yours.
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    Image 1 for
  • Can Top of CE Smith Swivel Bracket be Tightened to Keep Them at Angle
    The top of the swivel bracket is not something that can be tightened to completely stop the swivel for the CE Smith Bolster and Swivel Bracket Assemblies # CE10002G-4. So there is always going to be some swivel in these brackets to ensure that they are always at the correct angle when being loaded. I also wanted to mention that to install these brackets you will need U-bolts, the CE Smith U-Bolts # CE15283GA-4. I have added some links below to video reviews for you to check out as well...
    view full answer...
  • When Using Two Sets Of CE Smith Roller Bunks For Boat Trailers Is Weight Capacity Increased
    I called my contact at CE Smith about the Roller Bunks for Boat Trailers, part # CE27700. They said since you are planning on using 4 bunks instead of 2, the rollers would have no problem with the additional 500 lbs as you described, as long as the weight is distributed evenly on the roller bunks. These roller bunks can be attached to wooden bunks or you may want to use swivel brackets like part # CE10003G-4. If you need U-bolts I recommend part # CE15283GA-4 for 4 U-bolts. For 4...
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  • Bracket Recommendation for Installing Carpet Bunks on a Boat Trailer
    For the carpeted bunks part # CE27840 that are in the review video that I attached the easiest way to install them would be to use the swivel brackets part # CE10000G-4 which I attached a review video of as well. I also attached a picture that shows the bunk and the bracket attached to a trailer frame. For a set of 4 u-bolts to attach the brackets you would want the part # CE15283GA-4.
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    Image 1 for
  • Replacement Bunk Boards and Brackets Needed for 1997 Esco Boat Trailer
    Typically yo'll use brackets like part # CE10000G-4 with U-Bolts like part # CE15283GA-4 and then a combination of bunk boards like the 3' long # CE27800, but since we don't have specs on what came with your 1997 Esco Boat Trailer you'll need to take some measurements of your trailer frame, your current hardware, and bunk boards to choose the correct replacement parts. Once you look at what is on your trailer you can either filter through the linked selection of boat trailer parts for...
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  • Recommended Bunk Boards and Brackets for Boat Trailer
    For your Calkins trailer, I recommend using the CE Smith Carpeted Bunk Boards for Boat Trailers - 6' Long - 1 Pair # CE27840. These bunk boards will install with the CE Smith Bolster and Swivel Bracket Assemblies # CE10001G-4 as well as CE Smith U-Bolts # CE15283GA-4.
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    Image 1 for
  • Recommended Placement of Bunk Boards on Bayliner Capri 1950
    After completing a very thorough image search online, it appears that the most common bunk placement is about 2/3 of the way between the keel and the ridge that runs along the side of the hull. Rather than on end, most of the bunks I saw had the board meeting the hull on the flat. This disperses more of the weight of the boat along the bunk. The # CE27820 bunk boards you mentioned would be perfect. I'd also recommend using # CE10001G-4 bunk brackets and # CE15283GA-4 Galvanized u-bolts.
    view full answer...
  • Replacing Rollers with Bunk Boards on Lund Boat Trailer
    There's no particular reason you can't replace the rollers on your Lund trailer with wooden bunks. To do this I recommend taking a look at the CE Smith Bunk Boards # CE27820 which include two 5 foot long pre-carpeted boards that will work great. The black carpeting is marine-grade so it's going to hold up just fine to frequent water exposure. To install the boards you will just need a set of bolster brackets like the CE Smith Galvanized # CE10000G-4 along with the U-Bolts and hardware...
    view full answer...
  • Maximum And Minimum Heights Of CE Smith 11" Bolster Assemblies On 3" Crossmembers
    I took the following measurements for the CE Smith Bolster and Swivel Bracket Assemblies # CE10001G-4 and the CE Smith U-Bolts # CE15283GA-4 that would fit a 3" crossmember. From the top of the swivel bracket to the inside of the U-bolt(top of crossemember) at its highest point it is 5-7/8". From the top of the swivel bracket to the inside of the U-bolt(top of crossemember) at its lowest point it is 3-1/2". You will need to add in the height of your Bunk Boards # CE27840 and/or Roller...
    view full answer...
    Image 1 for
  • Parts Needed To Replace Rollers With Bunk Boards on a ShoreLand'r R22L Boat Trailer
    First you will need to remove your roller assemblies and install CE Smith Bolster and Swivel Bracket Assemblies # CE10002G-4. You will need the CE Smith U-Bolts # CE15283GA-4 to secure them to your 2"x3" crossbars. You will need to source treated lumber for your bunk boards locally and cover them CE Smith Deluxe Marine-Grade Carpeting # CE11330.
    view full answer...
  • Installation Of Roller Bunks On Karavan Boat Trailer
    If the brackets don't allow enough swivel to allow the roller bunks to fit flush on the boat, I recommend replacing the brackets with bolster brackets that will allow enough swivel like the CE Smith Bolster and Swivel Bracket Assemblies - Galvanized Steel - 9" - Qty 4 # CE10000G-4. This bracket can be installed with CE Smith U-Bolts - Galvanized - 3-13/16" Long x 3-1/16" Wide x 1/2" Diameter - Qty 4 # CE15283GA-4. You will want the proper fit for best load support and function.
    view full answer...


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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Joshua S
Video Edited:
Joshua S
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C

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