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  6. 3-1/16 Inch Wide
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. Call 800-298-1624 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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CE Smith Boat Trailer Parts - CE15283GA-4

  • Roller and Bunk Parts
  • U-Bolts
  • 3-13/16 Inch Long
  • 3-1/16 Inch Wide
  • Galvanized Steel
  • 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   (78 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.

- CE15283GA-4
by:

Great quality1 fast shipping



- CE15283GA-4
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.



- CE15283GA-4
by:

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



- CE15283GA-4
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!



- CE15283GA-4
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!



- CE15283GA-4
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.



- CE15283GA-4
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!



- CE15283GA-4
by:

No issues. Just what I ordered!



- CE15283GA-4
by:

Service and follow up was phenomenal.



- CE15283GA-4
by:

Fast delivery nice parts



- CE15283GA-4
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



- CE15283GA-4
by:

bolted right up. Could not be happier.



- CE15283GA-4
by:

they were well-made with a good coating



- CE15283GA-4
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.



- CE15283GA-4
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!



- CE15283GA-4
by:

Great quality trailer hardware delivered before due date all good



- CE15283GA-4
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



- CE15283GA-4
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.



- CE15283GA-4
by:

Good product worked as intended



- CE15283GA-4
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.



- CE15283GA-4
by:

Communication is excellent. Parts are high quality and reasonably priced. I will continue to buy from etrailer.



- CE15283GA-4
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.



- CE15283GA-4
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!



- CE15283GA-4
by:

These u-bolts were just what I needed. Thanks for coming through etrailer



- CE15283GA-4
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.


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Show More Reviews

Ask the Experts about this CE Smith Boat Trailer Parts

  • Bunk Brackets and Keel Rollers for Magic Tilt Boat Trailer
    We do have bunk brackets and keel rollers that you can use with your Magic Tilt boat trailer, though not that size leaf spring. For the brackets you only need to choose the size you want: - 9 Inches: CE Smith Bolster and Swivel Bracket Assemblies # CE10000G-4 - 11 Inches: CE Smith Bolster and Swivel Bracket Assemblies # CE10001G-4 - 13 Inches: CE Smith Bolster and Swivel Bracket Assemblies # CE10002G-4 With each of these brackets you can attach them with CE Smith U-Bolts # CE15283GA-4. As...
    view full answer...
  • 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...
    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.
    view full answer...
  • 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...
    view full answer...
  • Parts Needed to Replace 12 x 2-1/2 Inch Rollers on Boat Trailer
    You may be able to use the 12-3/4" x 1/2" Roller Shaft with Pal Nuts # CE10705A with the Yates Side Guide Roller 12" Long - 1/2" Shaft # YR12243-4P, but it won't give you much space to work with. A better option is to use the Yates Side Guide Roller 12" Long # YR12243-5 instead, which uses a 5/8" shaft, along with bracket # 408300, shaft and pal nuts # CE10727A. We don't carry a 1/2" shaft kit that is longer than 12-3/4". The CE Smith U-Bolt Kit # CE15283GA-4, that you were looking...
    view full answer...
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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.
    view full answer...
    Image 1 for
  • 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"...
    view full answer...
  • Recommended Roller Bunks For LoadRite PWC Trailer
    The CE Smith Roller Bunks for Boat Trailers - 6 Rollers Each - 5' Long - 1,500 lbs - 1 Pair # CE27710 will work well for your LoadRite trailer. If you want the 4 foot option, you can use # CE27700. This will work with the CE Smith Bolster and Swivel Bracket Assemblies for Roller Bunks - Galvanized Steel - Qty 4 # CE10003G-4. These brackets will follow the contours of your boat. For installing the brackets, I recommend the CE Smith U-Bolts - Galvanized - 3-13/16" Long x 3-1/16" Wide x...
    view full answer...
    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...
    view full answer...
  • Type And Size Bolts To Attach Swivel Bracket To Carpeted Bunk Board. NEED WORK
    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...
    view full answer...
    Image 1 for
  • Compatibility of CE Smith Swivel Bracket with HE Parmer Bolster Bracket
    They would indeed work together. The # HP55FR is the portion that would attach directly to the bunk which would attach to the # CE10101G bolster bracket would would attach to the trailer itself. When the bolster and swivel are assembled, they'd look like part # CE10001G. To be honest, I'd recommend simply going with the # CE10001G as the hardware to assemble them is included that way. The angle of the swivel bracket is adjustable. The galvanized u-bolts for attaching the bolster brackets...
    view full answer...
  • 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.
    view full answer...
    Image 1 for
  • Recommended Brackets For Horizontal Bunk Board Installation
    To install bunk boards like the CE Smith Carpeted Bunk Boards for Boat Trailers - 6' Long - 1 Pair # CE27840 flat, I recommend using the CE Smith Bolster and Swivel Bracket Assemblies # CE10000G-4 along with the CE Smith U-Bolts - Galvanized # CE15283GA-4. You will simply tighten down the swivel bracket assemblies to make them lay flat.
    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...
  • Parts to Convert Roller Bunks to Bunk Boards on Boat Trailer
    It sounds like you are just wanting to switch to carpeted bunk boards. For that you can use the CE Smith Carpeted Bunk Boards for Boat Trailers, which come in a number of different lengths: 5 feet long # CE27820, 6 feet long # CE27840 or 7 feet long # CE27845. To install these you can mount them to brackets that are already on your trailer or use CE Smith Bolster and Swivel Bracket Assemblies; you would need two of these per bunk board. The assemblies are available in different lengths...
    view full answer...
  • 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.
    view full answer...
    Image 1 for
  • 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...
    view full answer...
  • Recommended Bunk Rollers And Hardware For 18.5 Foot Bass Boat
    No, one 5 foot long section is not enough for the support of your boat unless you will be using a combination of rollers and bunk boards. The CE Smith Roller Bunks for Boat Trailers - 6 Rollers Each - 5' Long - 1,500 lbs - 1 Pair # CE27710 will work well for your 18.5 foot bass boat if you use 2 roller sections on each side. You can see a similar install in the video review I've attached. You can use two 4 foot long sections on each side and still support your boat well. For that...
    view full answer...
  • Bunk Boards and Brackets That Allow for Angle Adjustment
    To adjust the angle of the bunk boards such as the 6' # CE27840, 5' # CE27820 or 4' # CE27810 you can simply use the Swivel Bracket Assemblies # CE10000G-4 which attach with U-Bolt Assembly # CE15283GA-4. The swivel brackets allow the bunk boards to tilt so they can accommodate boat hulls of different sizes.
    view full answer...
  • Converting Boat Trailer From Rollers to Bunk Boards
    For the bunks I recommend using two sets of the 5' CE Smith Carpeted Bunk Boards # CE27820, or you'd like to get your own wooden boards you can wrap them in Marine-Grade Carpeting # CE11349. To install the boards, you will need a pair of Bolster and Swivel Bracket Assemblies # CE10001G-4 per board, which are 11", as well as a pair of U-Bolt Kits # CE15283GA-4. I've added links to video reviews of these parts for you to check out as well.
    view full answer...
  • 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...
  • 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...
  • Replacement Brackets And Hardware For Boat Trailer Bunk Boards
    Thanks for the photos. For your boat trailer, I recommend the CE Smith Bolster and Swivel Bracket Assemblies - Galvanized Steel - 13" - Qty 4 # CE10002G-4. These brackets are available in different heights. These brackets are held to your trailer with u-bolts like the CE Smith U-Bolts - Galvanized - 3-13/16" Long x 3-1/16" Wide x 1/2" Diameter - Qty 4 # CE15283GA-4. These brackets hold on your Bunk boards like the CE Smith Carpeted Bunk Boards for Boat Trailers - 6' Long - 1 Pair...
    view full answer...
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  • 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....
    view full answer...
  • Bunk Boards Needed to Carry Kayaks on Boat Trailer
    You can actually purchase the carpeted bunk boards and the brackets that hold them, like what is on the CE Boat Trailer # CE48810, separately. This way you can add more to your trailer if you have the room for it. The Bolster and Swivel Bracket Assemblies # CE10000G-4 can be installed on your boat trailer using the CE Smith U-Bolts # CE15283GA-4. These U-Bolts are 3-13/16" long, 3-1/16" wide, and have a 1/2" diameter. For bunk boards we have a couple of different length options for...
    view full answer...
  • Bunk Boards or Roller Bunks and Brackets for Boat Trailer and 26 Cuddy Cabin Boat
    I don't believe there is a style of trailer called a low-tide trailer. Most of what you find on an internet search of that term is a broken boat trailer, so the gentleman may have been telling him his trailer was broken or soon to be broken. I've never seen bunk boards resting directly on the frame, so I recommend getting some bunk brackets. I recommend the CE Smith Bolster and Swivel Bracket Assemblies - Galvanized Steel - 13" - Qty 4 # CE10002G-4 along with the CE Smith U-Bolts...
    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...
  • Replacement Carpeted Bunks For Boat Trailer Recommendation
    We offer both carpet that you can use to replace your worn carpet on your bunks for your trailer, and we also carry replacement carpeted bunks for your trailer. The carpeted bunks we offer come in varied lengths. If you need 6 ft bunks, I recommend part # CE27840. These come in a set of 2, and is wrapped with marine-grade black carpeting. For 5 ft bunks, you would need part # CE27820, for 4 ft bunks, part # CE27810, and for 3 ft bunks you would need part # CE27800. If you decide...
    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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