Shock Tab, 3/8 Hole, Chromoly

OVERVIEW

When you are building a high-performance air-cooled machine, whether it is a rugged Baja Bug, a lightweight sand rail, or a custom tube-chassis drag racer, the integrity of your suspension mounting points is something you can never afford to overlook. The A&A Manufacturing FAB-3102 Chromoly Shock Tab is engineered specifically for builders who demand superior strength without the unnecessary bulk of mild steel. These tabs are crafted from 4130 chromoly, a material renowned in the aerospace and off-road racing industries for its incredible strength-to-weight ratio and its ability to withstand the extreme fatigue cycles common in off-road environments. By choosing chromoly over standard cold-rolled steel, you are ensuring that your shock mounts can handle the violent cycles of a long-travel suspension system without cracking or egging out the bolt holes over time.

Precision is the name of the game in custom fabrication, and these tabs deliver exactly that. Featuring a clean 3/8-inch hole, they are perfectly sized for a variety of hardware applications, ranging from lightweight shock mounting to securing limit straps or even mounting custom reservoir brackets. The 1/8-inch thickness provides a slim profile that makes it easy to weld into tight spaces on a chassis or trailing arm, yet the metallurgical properties of the chromoly ensure it remains rigid under load. At Appletree Automotive, we understand that a build is only as strong as its weakest weld-on component. That is why we carry A&A Manufacturing parts; they provide the consistency and reliability required for professional-grade fabrication. Whether you are boxing in a stock VW beam or starting from scratch on a full-chromoly race frame, these tabs are the industry standard for a clean, professional, and bulletproof finish.

FITMENT

This is a universal fabrication component designed for custom applications. While it is commonly used on air-cooled Volkswagen platforms, it is suitable for any vehicle utilizing a 3/8-inch mounting bolt. Common applications include:

• VW Beetle & Super Beetle: Custom Baja Bug suspension builds and reinforced shock towers.
• VW Karmann Ghia: Custom street-performance suspension modifications.
• VW Type 181 Thing: Heavy-duty off-road suspension upgrades.
• Sand Rails & Dune Buggies: Ideal for Berrien, Chenowth, and custom tube chassis fabrication.
• Manx-Style Buggies: Perfect for mounting rear shocks or limit straps on shortened floorpans.
• Custom Off-Road Rigs: Suitable for UTVs, rock crawlers, and trophy truck support brackets.

SPECS

Detailed technical specifications for the FAB-3102 Chromoly Shock Tab:

• Manufacturer: A&A Manufacturing
• Part Number: FAB-3102
• Material: 4130 Chromoly Steel
• Hole Diameter: 3/8 Inches (.375")
• Material Thickness: 1/8 Inch (.125")
• Finish: Raw Steel (Requires welding and coating)
• Quantity: Sold Individually (Sold Each)
• Application: Weld-on fabrication tab for shocks, straps, or accessories.

PRO TIPS

1. Prioritize TIG Welding for Chromoly: When you are working with 4130 chromoly components like this shock tab, TIG (Tungsten Inert Gas) welding is the preferred method. TIG welding allows for better heat control and a cleaner bead, which is essential to prevent the material from becoming brittle. Always ensure you are using the correct filler rod (such as ER70S-2 or ER80S-D2) to maintain the structural integrity of the joint. If you must MIG weld, ensure your settings are dialed in perfectly to achieve deep penetration without overheating the base metal.

2. Use a Dummy Bolt for Alignment: When welding a pair of tabs to a chassis or arm to create a double-shear mount, it is easy for the tabs to warp or pull out of alignment due to the heat. I always recommend using a "dummy" bolt and a spacer that matches the width of your shock eyelet or limit strap bushing. Bolt the tabs together with the spacer in between before you start tacking them in place. This ensures that once the metal cools, your 3/8-inch bolt will slide through both holes perfectly without any binding.

3. Proper Surface Preparation: These tabs arrive in raw steel to facilitate immediate welding, but you must clean them thoroughly before you strike an arc. Use a flap disc or a wire wheel to remove any surface oxidation or oils from the tab and the mounting surface. Once the welding is complete and the metal has cooled, don''t forget to apply a high-quality paint, powder coat, or even a simple clear coat. Because chromoly has a higher carbon content than mild steel, it can be more prone to surface rust if left exposed to the elements, especially in damp garage environments or off-road conditions.