OSG Screw Thread Insert STI Tap: Spiral Fute, 1/2"-13 UNC, H4 / 2B-3B, 4 Flute

This OSG spiral-flute STI tap is used to cut internal threads in steel and stainless steel for installing screw thread inserts. It is ideal for repair or reinforcement applications where a 1/2"-13 UNC thread is required, such as in automotive, aerospace, and industrial maintenance.

The OSG STI tap has a 1/2"-13 UNC thread size, H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. It is designed for steel and stainless steel. The spiral-flute design aids chip evacuation in blind-hole threading. Manufacturer part number is 0147708.

3G Electric supplies the OSG STI Tap 0147708 to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine OSG taps and support procurement across 14 departments including machining and tooling.

Select an STI tap with the same thread size and pitch as the insert, here 1/2"-13 UNC. Use a bottoming chamfer for blind holes and a spiral-flute design for steel or stainless steel to clear chips. The H4 / 2B-3B tolerance ensures proper fit for the insert. OSG taps are a reliable choice for this application.