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

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

This OSG STI tap has a 1/2"-20 UNF thread size, H4 / 2B-3B tolerance, and a spiral flute design with 3 flutes. The spiral flute helps evacuate chips upward, making it suitable for through-hole and blind-hole threading in multiple materials.

You can source the OSG Screw Thread Insert STI Tap 31502301 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring you receive the correct OSG tap for your threading application.

Select an OSG STI tap based on the thread size and tolerance required for your insert. For a 1/2"-20 UNF insert, use this H4 / 2B-3B tap. Ensure the tap matches the insert manufacturer's specifications and consider material type—spiral flute taps work well for both through and blind holes.