OSG Spiral-Flute STI Tap, 7/8"-9 UNC, H5 Tolerance, 4 Flutes

The OSG Screw Thread Insert STI Tap is used to cut internal threads in steel and stainless steel for installing screw thread inserts. It is commonly applied in automotive, aerospace, and general manufacturing where strong, wear-resistant threads are required in softer base materials.

The OSG STI Tap model 30205408 has a thread size of 7/8"-9 UNC, with a spiral flute design and 4 flutes. It is ground to H5 tolerance for 2B-3B class fit. This tap is designed for threading holes that will accept screw thread inserts in steel and stainless steel workpieces.

You can source OSG STI Taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG 30205408 tap.

To select the correct OSG STI Tap for steel, match the thread size and pitch to your insert requirements. For steel and stainless steel, choose a spiral flute tap like the OSG 30205408 to evacuate chips. Ensure the tap tolerance (e.g., H5) aligns with the desired thread class (2B-3B).