Overview

The Attwood Marine 11434-3 is a square-bend U-bolt set used on trailer roller brackets and bow stop assemblies. It uses 7/16 inch stock with a 3-1/8 inch inside width, a 3 inch inside height, and 2 inch threaded ends, so it fits hardware that needs that exact span, leg height, and thread length.

This is a discontinued part, which makes dimension matching more important before ordering. The zinc-plated steel build suits trailer hardware that sees launch ramps, road spray, vibration, and regular wet and dry cycles, and it comes with lock washers and nuts for the bracket assembly.

Key features

• Square-bend U-bolt set for roller bracket and bow stop hardware
• 3-1/8 inch inside width and 3 inch inside height for bracket setups that need that exact shape and span
• 7/16 inch stock with 2 inch threaded ends
• Zinc-plated steel construction
• Includes lock washers and nuts
• Useful when replacing bent, worn, or corroded roller bracket hardware without changing bracket dimensions

Compatibility and fit

Check the old U-bolt or the bracket opening before ordering. This part is meant for setups that use a square-bend profile rather than a round U-bolt, and it is commonly used where the bolt wraps around a flat-sided roller bracket.

The safest match points are the inside width, inside height, stock diameter, and thread length. If your current hardware uses a different span, a different leg length, or a different bolt diameter, the fit will not be correct even if the bracket looks similar at a glance.

Installation and setup

This type of hardware is usually replaced during bow stop or keel roller service on a trailer. Clean the bracket surfaces, check the bracket slots for wear, and inspect the roller bracket itself before reassembly so the new hardware is not being tightened against bent or worn metal.

After installation, it is worth checking the hardware again after the first few trips. Trailer roller assemblies deal with road shock, ramp use, and repeated vibration, so periodic inspection helps keep the bracket secure and the roller aligned where the boat meets the trailer.