OSG Screw Thread Insert STI Tap: Spiral Fute, 1/2"-20 UNF, H4 / 2B-3B

An OSG spiral-flute STI tap is used to cut internal threads in steel and stainless steel for screw thread inserts. It is designed for blind-hole threading, with spiral flutes that evacuate chips upward, preventing clogging and ensuring clean threads in demanding industrial applications.

The OSG STI tap model 30202701 has a thread size of 1/2"-20 UNF, a thread limit of H4 / 2B-3B, and 4 flutes. It is a spiral-flute tap designed for steel and stainless steel. The manufacturer part number is 30202701, and it is used for screw thread insert installation.

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; we supply genuine OSG tooling for international procurement needs.

To select the correct OSG STI tap, match the thread size and pitch (e.g., 1/2"-20 UNF) to the insert requirements. Verify the thread limit class (H4 / 2B-3B) for fit tolerance. Choose spiral-flute taps for blind holes in steel or stainless steel to ensure chip evacuation and thread quality.