OSG 1/2"-20 UNF Spiral-Point STI Tap, H4 / 2B-3B, 3 Flute, Plug Chamfer

An OSG Screw Thread Insert STI Tap cuts internal threads in a pre-drilled hole to accept a helical wire thread insert. It is used in industrial maintenance and production to repair or reinforce stripped threads in metals and plastics, ensuring a durable, reusable threaded connection.

The OSG STI Tap 12500800 is a spiral-point, plug-chamfer tap with a 1/2"-20 UNF thread, H4 / 2B-3B tolerance, and 3 flutes. It is designed for through-hole tapping and produces threads that accept screw thread inserts. The spiral point pushes chips ahead, reducing clogging.

3G Electric supplies the OSG STI Tap 12500800 to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial sourcing partner, we provide genuine OSG taps and support for your threading applications across all regions.

Select an STI tap that matches the thread insert's size and pitch, such as 1/2"-20 UNF. The tap tolerance (e.g., H4 / 2B-3B) must align with the insert's class. Use a plug chamfer for through holes and a bottoming chamfer for blind holes. Always verify the tap's flute count and coating for the workpiece material.