Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - BS. Brass - 7/16 x 26

The Baer Heli Coil Tap is the precise, reliable tool you reach for when damaged threads threaten performance—and when you need to reinforce threads for long-lasting durability. Designed as a dedicated bottoming tap (STI) for wire thread inserts, this tool pairs with Heli-Coil style inserts to restore strength in worn holes and deliver dependable engagement in a variety of applications. If you’re rebuilding damaged components or expanding the life of machinery that sees heavy use, this tap ensures clean, accurate threads every time.

What makes this tap a standout choice

• Bottoming design for full-depth threads: The bottoming geometry cuts threads all the way to the base of the hole, creating a seamless seat for the coil insert and ensuring maximum pull-out resistance.
• Optimized for Heli-Coil style reinforcement: Engineered to pair with wire thread inserts, delivering a secure, uniform thread that can withstand repeated assembly and disassembly.
• Reliable size: 7/16 x 26: A precise, common thread size that covers a broad range of repair and reinforcement scenarios, from automotive components to machinery housings. The listing specifies this exact size for confident compatibility.
• Durable construction with brass finish details: Built to endure shop use and tool chatter, with finishing considerations described in the product’s designation to balance durability and longevity in busy work environments.
• Efficient, professional results: When used correctly, this tap minimizes material deformation and produces clean, repair-ready threads that accept inserts with minimal effort.

Whether you’re a shop technician, hobbyist, or maintenance professional, the Baer Heli Coil Tap helps you quickly repair stripped threads in softer metals like aluminum or steel housings, then reinforce them for repeat service. Its focused geometry and purpose-built design reduce the risk of oversizing or undercutting threads, so you can trust that repaired holes will perform under load, vibration, and frequent assembly cycles.

Practical use cases

• Repairing stripped threads in engine blocks, cylinder heads, or aluminum housings where a durable coil insert is required for long-term reliability.
• Reinforcing threaded holes in agricultural, automotive, or industrial equipment that experience frequent disassembly and reassembly.
• Reworking damaged threaded pockets in soft metals where standard taps would risk wall loss or misalignment.
• Preparing holes for new fasteners in late-model machinery where maintaining precise thread engagement is critical for performance and safety.

Tips for best results

• Pair this bottoming tap with a compatible Heli-Coil insert kit and a quality threading lubricant to prolong tool life and achieve accurate threads.
• Use the proper drill size for your target hole before tapping—establish the correct diameter to ensure the tap will cut cleanly and the insert will seat without play.
• Keep the tap perpendicular to the workpiece and apply steady, moderate pressure to avoid chatter and thread distortion.
• Clean the hole between passes to remove chips that could impede thread formation or insert seating.
• Inspect the finished threads with a test bolt or go/no-go gauge to confirm proper engagement depth and insert fit.

This tap is a focused, purpose-built tool for repairing and reinforcing threads with Heli-Coil style inserts. By delivering crisp, bottomed threads in a single operation, it accelerates repair workflows and extends the service life of critical components. If you’re looking to restore damaged threads and ensure durable, repeatable performance, the Baer Heli Coil Tap is the dependable choice that professionals trust.