OSG Screw Thread Insert STI Tap: Spiral Fute, 1/2"-20 UNF, H4 / 2B-3B, 4 Flute

An OSG Screw Thread Insert STI Tap is used to cut internal threads in a workpiece before installing a helical wire thread insert. It is commonly applied in aerospace, automotive, and general manufacturing where strong, wear-resistant threads are required in softer materials like aluminum or cast iron.

The OSG 10800700 is a spiral-flute STI tap with a 1/2"-20 UNF thread, H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. It is designed for through or blind holes and produces threads that accept screw thread inserts. The spiral flute design aids chip evacuation in deep-hole tapping.

You can source OSG STI Taps, including the 10800700 model, through 3G Electric. As a global industrial equipment distributor since 1990, 3G Electric handles full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time.

Select an OSG STI Tap based on thread size (e.g., 1/2"-20 UNF), tolerance class (H4 for 2B-3B fit), chamfer type (bottoming for blind holes), and flute design (spiral flute for chip evacuation). Match the tap to the insert manufacturer's recommendations and the workpiece material hardness.