Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - UNF - 3/8 x 24

The Baer Heli Coil Tap is your dedicated bottoming tap for UNF threads, engineered to deliver flawless thread repairs and rock-solid reinforcements with Heli-Coil wire thread inserts. Built for durability and precision, this tool helps you restore damaged holes and create dependable, repeatable threads in a variety of metal applications.

Why this bottoming tap stands out

• Robust HSS construction provides long-lasting cutting performance and resists wear in tougher materials, so you won't have to replace taps after a single job.
• Bottoming geometry (STI) is designed to chase threads to the full depth of a blind hole, ensuring complete engagement and proper seating of inserts or fasteners.
• Precisely formed threads deliver clean, true pitches that align perfectly with UNF standards, reducing the risk of cross-threading and mismatch during assembly.
• Designed for 3/8 x 24 UNF holes and compatible with Heli-Coil wire thread inserts, making it ideal for repair, reinforcement, and maintenance across automotive, machining, and fabrication projects.
• Versatile performance excels in a range of metals and alloy substrates, from aluminum to steel, helping you recover performance without invasive repairs.

Practical use cases

• Repair stripped or worn UNF threads in housings, engine components, brackets, and structural parts.
• Reinforce critical threaded joints that endure high loads or frequent disassembly with reliable insert installations.
• Prepare holes for precision assemblies where thread integrity directly affects torque tolerance and overall reliability.

How to use (high level)

• Select the correct drill size and prepare the hole, ensuring clean, burr-free edges.
• Use appropriate lubrication for smooth cutting and tool longevity.
• Align the tap squarely and cut to the required depth, using the bottoming geometry to reach the full thread length.
• If installing Heli-Coil inserts, follow insert manufacturer guidelines to complete the repair or reinforcement.

The Baer Heli Coil Tap is the targeted, professional-grade solution for reliable thread repairs and reinforcements. When you need durable, accurate UNF threads that stand up to use and time, this bottoming tap is the tool you reach for first.