OSG Screw Thread Insert STI Tap: Spiral Fute, #4-48 UNF, H2 / 2B-3B

The OSG Screw Thread Insert STI Tap is used to cut internal threads in multiple materials for installing screw thread inserts. It is commonly applied in aerospace, automotive, and general manufacturing where thread repair or reinforcement is needed. The spiral-flute design aids chip evacuation in blind-hole applications.

This OSG STI tap has a #4-48 UNF thread size, H2 / 2B-3B tolerance, and a 2-flute spiral-flute design. The manufacturer part number is 31500208. It is designed for multiple materials and produces threads that accept standard screw thread inserts. The H2 tolerance ensures precise thread fit for insert installation.

You can source OSG Screw Thread Insert 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 #4-48 UNF spiral-flute tap (MPN 31500208).

Select an OSG STI tap based on the thread size and tolerance required for your insert. For #4-48 UNF, use a tap with H2 / 2B-3B tolerance to match standard insert dimensions. The spiral-flute design is ideal for blind holes. Always verify the tap matches the insert manufacturer's recommendations for material and thread class.