Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - UNF - 7/16 x 20

Restore damaged threads with confidence using the Baer Heli Coil Tap — a precision bottoming tap engineered for reliable thread repairs and reinforcement with Heli-Coil wire inserts. Designed for UNF 7/16 x 20 holes, this STI bottoming tap cuts clean, true threads to full depth, ensuring maximum engagement and durability for every repair.

• Exact UNF 7/16 x 20 threading crafted to match standard Heli-Coil inserts, delivering dependable fit and long-lasting performance.
• Bottoming (STI) geometry reaches the full thread depth in blind holes, preventing incomplete threads and rework.
• High-quality cutting edge typically built from durable materials (common practice uses robust HSS variants) for clean cuts, reduced burrs, and extended tool life.
• Designed for thread repair and reinforcement ideal for automotive, machinery, and equipment applications where stripped threads compromise performance.
• Easy integration with Heli-Coil inserts complements comprehensive repair kits, helping you restore original strength without replacing components.

Use cases include repairing stripped threaded holes in engine blocks, cylinder heads, intake manifolds, transmission cases, and various housings where UNF threads are standard. The Baer Heli Coil Tap provides consistent hole preparation, enabling the insert to seat properly and resist vibration, heat, and load over time.

Practical tips for best results: select the correct drill size for your hole, deburr the entry to prevent insert binding, and apply light lubrication to the tap to reduce friction and heat buildup. When used with the corresponding Heli-Coil insert kit, this tap becomes a dependable part of your repair workflow, delivering repeatable accuracy and lasting thread integrity.