We are proud to introduce the HY-PRO® SIGMA SFT & POT Taps, the next evolution of OSG’s industry‑leading HY‑PRO threading series. For decades, the HY‑PRO® tap has been the reliable choice for job shops across the United States, known for its consistency, versatility, and proven performance across countless materials and applications.
The new HY‑PRO® SIGMA series builds on that legacy with a redesigned flute form, enhanced cutting-edge geometry, and a premium vanadium high‑speed steel substrate — delivering longer tool life, more stable chip control, and uninterrupted machining even in challenging materials like steel and stainless.
Engineered as the ultimate “Do It All” tap, HY‑PRO® SIGMA expands the range of materials and applications that can be confidently tackled with a single, dependable tool.
 The HY-PRO® SIGMA offers the following features & benefits:
✓ Sharp Cutting Edge — Stabilizes chip shape and reduces cutting resistance for smoother, more efficient tapping.
✓ New Special Flute Form — Optimized to improve chip formation and evacuation,
✓ Superior Durability — Geometry engineered to last longer and maintain performance in harder materials.
✓ DIN Length — Provides improved chip evacuation in blind hole applications.
 The following list numbers are associated with the release:
- NEW!  List #10280 – HY-PRO® SIGMA POT (Inch)
- NEW!  List #10289 – HY-PRO® SIGMA POT (Metric)
- NEW!  List #10290 – HY-PRO® SIGMA SFT (Inch)
- NEW!  List #10299 – HY-PRO® SIGMA SFT (Metric)