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  1. Boat Trailer Parts
  2. CE Smith
  3. U-Bolts
  4. 3-13/16 Inch Long
  5. 1/2 Inch Diameter
  6. Galvanized Steel
CE Smith U-Bolts - Galvanized - 3-13/16" Long x 3-1/16" Wide x 1/2" Diameter - Qty 4
CE Smith

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

Part Number: CE15283GA-4
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$59.76
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. 1-800-940-8924 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. Great prices 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

  • U-Bolts
  • 3-13/16 Inch Long
  • 1/2 Inch Diameter
  • Galvanized Steel
  • 3-1/16 Inch Wide
  • 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




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Customer Satisfaction Score:


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   (333 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.

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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 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.
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  • Will A Stryker LX 360 Air Boat Fit On CE Smith Multi Sport Boat Trailer CE48810?
    Since your Stryker LX 360 inflatable boat is 11'7" long x 5'6" wide it will fit on the CE Smith Multi Sport Boat and Kayak Trailer w/ Bunks - 8" Wheels - 12' Boat - 800 lbs # CE48810 you were looking at and have the motor/transom completely on the bunks, but the front half of the boat will not be. The bunks are only 4-1/2' wide so you will have about 6" overhang on each side of the trailer. You will just want to move the winch mount forward until it is in the correct location for you to...
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  • Parts Needed to Convert a Boat Trailer From Rollers to Bunks
    In order to switch from rollers to bunks, you will need to remove the rollers that you are no longer using. I do not see a reason why you can't continue to use the front rollers. You would just want bunks that stop a little but before the front rollers so they do not interfere with each other. You would need to get the bunk boards, swivel brackets and u-bolts for installing the bunk boards. You will need to measure to determine the correct length of bunk board that fits between the middle...
    view full answer...
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  • Are U-Bolts Included With CE Smith Bolster and Swivel Bracket Assemblies
    The CE Smith Bolster and Swivel Bracket Assemblies # CE10000G-4 only come with the brackets, U-bolts are sold separately. For U-bolts you can use the CE Smith U-Bolts - Galvanized # CE15283GA-4.
    view full answer...
  • 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...
  • 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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  • 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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  • Replacement Hydraulic Brake Actuator and Drum Brakes for Karavan Trailer
    The Demco Hydraulic Brake Actuator # DM72VR you looked at will be a great replacement for your Karavan trailer. This matches the gross towing weight of the original brake actuator and mounts on a 3" wide trailer tongue. It also features the EZ-Latch coupler mechanism for a simple hookup and a 120-hour salt spray rating. Your trailer came with galvanized 10" free backing brake assemblies. For a replacement I recommend the Demco Hydraulic Brake Kit # 40716-15. These brake assemblies have...
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  • 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...
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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...
  • Parts Needed to Add Bunk Boards to a Utility Trailer
    To add bunks, you will need the bunks, brackets, and u-bolts. Bunks - CE Smith Carpeted Bunk Boards # CE27845 Brackets - CE Smith Bolster and Swivel Bracket Assemblies # CE10000G-4 U-bolts - CE Smith U-Bolts # CE15283GA-4 This is typically done on boat trailers, that already have the proper crossbars in place. Since you are converting a utility trailer, you may need to make some modifications to add crossbars, if there are not any already in place.
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  • Parts Needed to Convert a Boat Trailer From Rollers to Bunk Boards
    This can absolutely be done. While there are not "kits" for doing the conversion, we do have the parts that you will need. These are not kitted together because each boat/trailer combination is different, so it is easier to not kit them. It is recommended to have bunk boards that are at least 50% of the length of your boat. You can have longer boards if you would like, but you want at minimum 50% of the length. Since your boat is 21', you will want bunks that are at least 10.5' long. I...
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  • 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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  • 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.
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  • Recommended Replacement Brackets And Hardware For Karavan SLT-5000
    For your boat trailer, I recommend the CE Smith Bolster and Swivel Bracket Assemblies # 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 # CE15283GA-4. These brackets hold on your Bunk boards like the CE Smith Carpeted Bunk Boards for Boat Trailers - 6' Long - 1 Pair # CE27840 that are available in different lengths or the roller bunks...
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  • Replacement Bunk Brackets for 13-Foot Trailer
    I have added a link to our page with each of our bunk brackets on it. Each of the brackets we have available are made of galvanized steel, such as # CE26233-34GA and # CE10100G, or zinc-plated steel, such as # DL21742, which are designed to resist corrosion and avoid rotting out.
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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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  • 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...
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  • 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 at,...
    view full answer...
    Image 1 for
  • 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...
  • 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 well...
    view full answer...
  • Parts Needed To Convert Boat Trailer From Rollers To Bunk Boards
    Switching from roller bunks to bunk boards on your boat trailer is fairly straightforward. For the most part, you will just be replacing the rollers with the boards. We have the following bunk boards available: -CE Smith Carpeted Bunk Boards for Boat Trailers - 3' Long # CE27800 -CE Smith Carpeted Bunk Boards for Boat Trailers - 4' Long # CE27810 -CE Smith Carpeted Bunk Boards for Boat Trailers - 5' Long # CE27820 -CE Smith Carpeted Bunk Boards for Boat Trailers - 6' Long # CE27840 -CE...
    view full answer...


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Info for this part was:

Employee Lindsey S
Written by:
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Employee Jameson C
Expert Research:
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Video Edited:
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