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

Products Featured in This Question

CE Smith Bolster and Swivel Bracket Assemblies - Galvanized Steel - 9" - Qty 4

(612)

$58.15

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

(372)

$63.90

Stainless Steel Hex Lag Screw - 3/8"

(95)

$5.45

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?

expert reply by: Jerred H