The Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - UNF - 1.1/4 x 12 is the professional’s choice for creating clean, durable internal threads that are ready to receive Heli-Coil wire thread inserts. Designed to be paired with the Heli-Coil reinforcement system, this bottoming tap delivers precise thread geometry and reliable performance where it matters most.

What sets this tap apart is its bottoming design. It reaches full thread depth every time, ensuring the repaired hole has maximum engagement length for the insert. That means stronger, vibration-resistant threads that won’t loosen under load, making it ideal for critical assemblies in machinery, automotive components, and equipment housings.

Why you’ll reach for this tap

• UNF 1.1/4 x 12 compatibility: Specifically matched to your UNF thread repair needs, delivering accurate pitch and depth for durable reinforcements.
• Bottoming tap geometry: Cuts threads all the way to the bottom of the hole, ensuring full-thread engagement for reliable insert installation.
• Consistent performance: Engineered for clean, straight threads with repeatable results across multiple repair cycles.
• Versatile material compatibility: Effective for repairing threads in a range of metals commonly found in automotive, industrial, and fabrication applications.
• Easy integration with Heli-Coil inserts: When used with Heli-Coil wire thread inserts, you restore original strength and torque capacity without compromising geometry.

Ideal for technicians, machinists, and DIY enthusiasts who demand professional-grade thread repairs, this tap helps you restore damaged threads in critical components—engines, housings, brackets, and more—so your assemblies can be disassembled and reassembled with confidence.

Practical usage tips: align carefully with the hole, apply light cutting fluid, and maintain steady, straight motion to avoid cross-threading. After tapping, clear chips thoroughly before installing the Heli-Coil insert to ensure a smooth, secure fit.