Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - UNF - 5/16 x 24

The Baer Heli Coil Tap is the precise, durable tool you need for impeccable thread repairs and reliable reinforcements. Built to cut clean, true threads for helicoil inserts, this bottoming tap (STI) is optimized for UNF threads and specifically sized at 5/16 x 24 to match common helicoil systems. When a hole has lost its grip or stripped threads, this tap helps you restore strength without re-boring the part.

Key advantages of the Baer Heli Coil Tap

• Accurate UNF 5/16 x 24 threading engineered to pair seamlessly with standard helicoil wire thread inserts, delivering dependable repair threads that withstand repeated assembly and disassembly.
• Bottoming tap design (STI) reaches the full thread depth every time, ensuring complete engagement in blind holes and preventing shallow, weak engagements.
• Premium HSS construction with precision grinding for burr-free, smooth-cutting action that preserves surrounding material and extends tool life.
• Versatile for multiple metals suitable for steel, aluminum, and other common substrates found in automotive, machinery, and equipment restorations.
• Long-lasting reliability designed for repeated use in workshops or on-site repairs, reducing downtime and the need for frequent replacements.

Who benefits from the Baer Heli Coil Tap? Professionals repairing high-stress threads in automotive housings, hydraulic blocks, engine components, or machinery bases, as well as DIY enthusiasts tackling home workshop projects. This tap isn’t just about making threads—it’s about restoring structural integrity, enabling quick helicoil insert installation, and extending the life of parts prone to wear or damage.

Usage note: Pair this bottoming tap with compatible helicoil inserts and a tap wrench or driving tool. Use steady, guided rotation and appropriate cutting fluid to optimize chip evacuation, reduce heat, and preserve thread quality. The result is durable, reliable threads that perform under demanding conditions—without the cost and downtime of part replacement.