Seat Mount Bracket Fits 1 1/4

OVERVIEW

When you''re tearing through the dunes or navigating a punishing rock crawl in your air-cooled VW powered sand rail, the last thing you want to worry about is your seat shifting. The A&A Manufacturing Seat Mount Bracket is engineered specifically for enthusiasts who demand professional-grade security and precision in their tube chassis fabrication. Designed to fit perfectly over 1 1/4-inch OD (Outer Diameter) tubing, this bracket provides a rock-solid foundation for your racing seats, ensuring that you stay planted behind the wheel regardless of the terrain. Crafted from high-quality mild steel, these brackets are built to withstand the extreme vibrations and structural stresses common in off-road racing, making them an essential component for any serious Baja Bug, Manx, or custom rail build.

What sets this bracket apart is its thoughtful geometry and robust construction. With a 1/8-inch thickness, it strikes the ideal balance between weight savings and structural integrity, providing enough meat for a deep, penetrating weld without adding unnecessary bulk to your chassis. The pre-drilled 3/8-inch holes are spaced at 3 1/2 inches, which aligns with many industry-standard seat sliders and fixed mounts, significantly reducing the time you spend measuring and drilling on the workbench. Whether you are building a brand-new tube frame from the ground up or upgrading an older buggy to meet modern safety standards, these A&A Manufacturing brackets deliver the "weld-it-and-forget-it" reliability that Appletree Auto customers have come to expect from top-tier fabrication hardware.

FITMENT

While this is a universal fabrication component designed for 1 1/4-inch tubing, it is most commonly used in the following air-cooled VW and off-road applications:

• VW Sand Rails: All custom tube chassis utilizing 1.25-inch OD main or sub-frame rails.
• Dune Buggies: Meyer''s Manx, Berrien, and various fiberglass body buggies with internal roll cages.
• Baja Bugs: Custom interior cage work and seat sub-frames.
• Off-Road Race Cars: Class 11, Class 5-1600, and other vintage VW racing classes.
• Custom Tube Chassis: Any application requiring a radius-fit seat mount on 1 1/4-inch structural tubing.

SPECS

Detailed technical specifications for the FAB-3200 Seat Mount Bracket:

• Manufacturer: A&A Manufacturing
• Part Number: FAB-3200 (AA338A)
• Material: Heavy-duty Mild Steel
• Thickness: 1/8-inch (0.125")
• Overall Length: 5 7/8 inches
• Overall Width: 1 inch
• Hole Diameter: 3/8-inch (standard seat mounting bolt size)
• Hole Spacing: 3 1/2 inches (center-to-center)
• Radius Fitment: Designed for 1 1/4-inch (1.25") OD Tubing
• Finish: Raw steel (requires painting or plating after welding)
• Quantity: Sold Individually

PRO TIPS

1. Proper Surface Preparation is Paramount

Before you even think about striking an arc, you must ensure the mounting surface on your 1 1/4-inch tubing is completely free of mill scale, rust, or paint. Use a flap disc or a wire wheel to clean the tubing down to shiny, bare metal where the bracket will be seated. Since these brackets are raw steel, they may also have a light coating of oil or mill scale from the manufacturing process; cleaning the bottom radius of the bracket with a solvent or light sanding will ensure maximum weld penetration and a joint that won''t fail under stress.

2. Use a Jig or Dummy Bolt for Alignment

When welding seat mounts, it is incredibly easy for the heat to cause slight warping, which can make bolting the seat in a nightmare later. We highly recommend using a "dummy" bolt or a piece of threaded rod through the holes to keep the bracket perfectly aligned while you tack it into place. If you are installing a pair of brackets for one seat, use a flat piece of bar stock bolted across both brackets to ensure they stay parallel and level with each other during the final welding process. This extra step prevents the frustration of having to "clearance" your holes with a drill later on.

3. Manage Your Heat for Structural Integrity

Because you are welding a 1/8-inch bracket to what is likely .095 or .120 wall tubing, you need to manage your heat carefully. Start your tacks at the corners to secure the bracket, then move in short beads rather than one long continuous pass. This prevents the tubing from warping and ensures that you don''t blow through the chassis tube. Always ensure you have a fire extinguisher or welding blanket nearby, especially when working inside the cramped quarters of a VW Beetle or a sand rail interior where fuel lines or electrical wiring might be nearby.