Steel Tubing.375 x.065 Round 4ft ALL22117-4

OVERVIEW

When you are deep in the middle of a custom build, whether it is a rugged Baja Bug or a high-performance sand rail, the quality of your raw materials can make or break the integrity of your fabrication. The ALLSTAR PERFORMANCE .375-inch diameter steel tubing is an essential staple for any air-cooled VW enthusiast''s workshop. This 4-foot section of round mild steel tubing provides the perfect balance of strength and weight, making it the go-to choice for creating custom throttle linkages, shift rods, or lightweight structural bracing. At Appletree Automotive, we know that precision matters, and having a straight, high-quality piece of .065-wall tubing ensures that your welds penetrate deeply and your final product stands up to the vibrations and stresses of off-road abuse.

This specific ALL22117-4 tubing is designed for the fabricator who demands consistency. The .375-inch (3/8") outer diameter is ideal for small-scale projects where a larger tube would be overkill and a smaller wire would be too flimsy. Its .065-inch wall thickness offers enough "meat" for a clean MIG or TIG weld without the risk of easy burn-through, yet it remains light enough to keep your vehicle''s unsprung weight or interior clutter to a minimum. Whether you are reinforcing a seat mount, building a custom dash frame, or fabricating intricate engine bay supports for a dual-carburetor setup, this 4-foot length provides ample material to get the job done right the first time. Don''t settle for hardware store Grade-A zinc pipes that fail under pressure; use the professional-grade steel that the masters at Appletree trust for our own competition machines.

FITMENT

While this is a universal fabrication component, it is commonly utilized in the following air-cooled Volkswagen and off-road applications:

• Volkswagen Type 1: Beetle and Super Beetle (All Years) for custom linkage and interior bracing.
• Volkswagen Type 2: Bus, Transporter, and Kombi (Split Window & Bay Window) for throttle cable guides and custom dash work.
• Volkswagen Type 3: Squareback, Fastback, and Notchback custom engine compartment supports.
• Volkswagen Type 181: The Thing fabrication and roll cage gussets.
• Karmann Ghia: Custom seat frames and floorboard reinforcements.
• Sand Rails & Dune Buggies: Essential for throttle linkages, brake line protection, and light-duty bracing.
• Baja Bugs: Perfect for fender stiffeners and auxiliary light mounts.
• Meyers Manx: Custom chassis detailing and wiring loom protective runs.

SPECS

• Outside Diameter: .375 Inch (3/8")
• Wall Thickness: .065 Inch
• Overall Length: 4 Feet (48 Inches)
• Material: High-Quality Mild Steel
• Tubing Shape: Round
• Finish: Natural Raw Steel (Requires coating to prevent oxidation)
• Manufacturer: Allstar Performance
• Part Number: ALL22117-4
• Weldability: Excellent for both MIG and TIG welding processes.

PRO TIPS

Tip 1: Precision Bending for Small Diameter Tubing

When working with .375-inch tubing, it is tempting to use a standard handheld plumbing bender. However, for the best results in automotive fabrication, always use a dedicated tube bender designed for mild steel. Because the .065 wall is relatively thin compared to the diameter, using the wrong tool can lead to kinking or "ovaling" the tube. If you are making tight radius bends for a throttle linkage, consider filling the tube with fine sand and capping the ends before bending; this internal pressure helps maintain the round profile and prevents the tube from collapsing during the process.

Tip 2: Surface Preparation is Key for Structural Integrity

This tubing arrives in a natural, raw state, which means it may have a light coating of mill scale or oil to prevent immediate rusting during transit. Before you strike an arc, you MUST clean the weld zone thoroughly. Use a flap disc or sandpaper to strip the steel down to a bright, shiny finish, and then wipe it down with a wax and grease remover or acetone. Clean steel ensures that your weld penetrates through the .065 wall properly, creating a bond that won''t crack when you are bouncing across the dunes or hitting high RPMs on the street.

Tip 3: Managing Heat Soak on Thin-Wall Tubing

Because this tubing has a .065-inch wall thickness, it can heat up very quickly during the welding process. If you are welding this to a thicker chassis plate or a heavy-duty bracket, always "aim" your arc toward the thicker material and "wash" the puddle onto the thinner .375 tubing. This technique prevents you from blowing a hole through your new tubing. If you are TIG welding, use a smaller diameter tungsten and keep your amperage controlled to ensure a localized heat-affected zone, which preserves the structural temper of the steel around your joint.