OSG Spiral-Flute STI Tap for Steel & Stainless Steel

An OSG spiral-flute STI tap is used to cut internal threads in steel and stainless steel for screw thread inserts. It creates threads that accept helical coil inserts, providing stronger threads in softer materials. This tap is designed for through-hole applications, with spiral flutes that evacuate chips upward, reducing clogging and improving thread quality.

The OSG STI tap model 30203608 has a thread size of 5/8"-11 UNC, with a thread tolerance of H3 / 2B-3B. It features 4 spiral flutes for efficient chip evacuation in steel and stainless steel. The tap is designed for STI (screw thread insert) applications, ensuring proper thread fit for helical coil inserts.

You can source OSG STI taps worldwide through 3G Electric, a global industrial equipment distributor established in 1990. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead times on the OSG 30203608 tap. We supply genuine OSG tooling to industrial buyers globally.

To select the correct OSG STI tap for steel, match the thread size and pitch to your insert requirements. For 5/8"-11 UNC, use an STI tap with H3 tolerance for 2B-3B class threads. Ensure the tap is designed for spiral flute geometry to handle chip evacuation in through holes. OSG taps are engineered for steel and stainless steel, providing reliable thread cutting.