Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - BS. Brass - 1/2 x 26

The Baer Heli Coil Tap is the dedicated bottoming tap you reach for when thread repairs and reinforcements are on the line. Designed to work with wire thread inserts, this STI bottoming tap delivers clean, accurate threads in brass and other soft metals, restoring strength where it’s most needed. The 1/2 x 26 size provides the right balance of rigidity and compatibility for practical repair jobs, making it a go-to tool in any maintenance or fabrication kit.

• 1/2 x 26 size— a versatile thread form that suits a broad range of brass components and inserts.
• Bottoming tap (STI) design— taps to full thread depth, ideal for blind holes and ensuring complete engagement with wire thread inserts.
• Brass-focused performance— engineered to produce true, concentric threads in brass and other soft alloys, reducing the risk of insertion failure.
• Durable construction— precision-machined from quality steel to withstand repeated use and maintain accurate thread profiles over time.
• Optimized for wire thread inserts— pairs seamlessly with Heli-Coil and similar inserts to restore original thread strength and reliability.

This tap is ideal for technicians and machinists tackling repairs in housings, brackets, valves, and other components where brass or soft metals are common. When threads have worn or stripped, this bottoming tap creates a solid foundation for a coil insert, delivering durable, long-lasting performance and helping you avoid costly part replacements.

How this tap stands apart: it’s purpose-built to deliver precise depth and a smooth finish that supports reliable insert installation, not just quick threading. The result is reinforced threads that resist pull-out and fatigue, even in high-load applications.

Practical tips: lubricate with an appropriate tapping fluid, keep the tool aligned with the hole to prevent cross-threading, and ease pressure as you approach full depth to minimize burrs. After tapping, test with a coil insert to verify bite and alignment before final assembly.

Baer quality means you’re investing in a tool you can count on for years of dependable thread repairs and reinforcements.