OSG Spiral-Flute STI Tap for Aluminum, #2-56 UNC, H2 / 2B-3B, 2 Flute

An OSG Screw Thread Insert STI Tap cuts internal threads in aluminum to accept helical wire thread inserts. It is used in aerospace, automotive, and general manufacturing to repair or reinforce tapped holes, ensuring strong, wear-resistant threads in soft materials.

This OSG STI Tap is #2-56 UNC with a spiral flute design, H2 / 2B-3B tolerance, and 2 flutes. It is designed specifically for aluminum and produces threads that accept screw thread inserts. The manufacturer part number is 1303900108.

3G Electric supplies OSG STI Taps for aluminum worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us to source this #2-56 UNC spiral-flute tap and other precision tooling.

Select an STI tap that matches the thread insert's nominal size and pitch, such as #2-56 UNC. The tap must be marked 'STI' and have the correct tolerance (e.g., H2 / 2B-3B) to produce threads that accept the insert. Always verify the insert manufacturer's recommendations.