How Long of Lag Bolts Should I Use w/ the CE Smith Bolster and Swivel Bracket Assemblies?
Updated 08/15/2025 | Published 07/16/2025
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Question:
I need to replace the bunker brackets on a bass boat trailer. The cross members are 3inches vertical and 1.5 inches thick. Which U bolts size do you recommend to go with your swivel bracket yopu sell. I am buy the 9 inch brackets. Also, what size lag bolts do you recommend to attach the bunker boards to the new brackets. Thanks,
asked by: Jeff F
Expert Reply:
Hey Jeff. The CE Smith Bolster and Swivel Bracket Assemblies item # CE10000G-4 are going to need a 3-1/16" wide on the inside u-bolt that has threads that go down to at least 1-1/2" from the inside of the bolt. The 3-13/16" Long x 3-1/16" Wide CE Smith U-Bolts item # CE15283GA-4, you were looking at aren't going to work with a 1-1/2" wide frame member. The threads don't go down far enough. You'll need to source those u-bolts elsewhere as we do not have any that will work.
The 1-1/4" long Stainless Steel Hex Lag Screw item # FA74521 would work great with a 2x4 or 2x6. They're 3/8" wide like the mounting holes in item # CE10000G-4. You'll need two per mounting bracket.
How big is your bass boat?
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Product Page this Question was Asked From
CE Smith Bolster and Swivel Bracket Assemblies - Galvanized Steel - 9" - Qty 4
- Boat Trailer Parts
- Bunks
- Bunk Bracket
- Swivel Bracket
- 2 Inch Tall
- 8 Inch Tall
- 1-3/8 Inch Wide
- 2-1/2 Inch Wide
- Galvanized Steel
- 3-1/2 Inch Long
- CE Smith
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Jerred H.
8/15/2025
Hey Jeff, did you manage to find the right U-bolts for your bass boat trailer? I'm curious because it could help others facing the same challenge.