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

An OSG Screw Thread Insert STI Tap is used to cut internal threads in a pre-drilled hole before installing a helical wire thread insert. It is commonly applied in aerospace, automotive, and general manufacturing to repair or strengthen threads in softer materials like aluminum or cast iron.

This OSG STI Tap is a #4-48 UNF size with a spiral flute design, H2 / 2B-3B thread class, 3 flutes, and a bottoming chamfer. The manufacturer part number is 10800200. It is designed for use with screw thread inserts to produce accurate internal threads in demanding industrial applications.

You can source the OSG STI Tap #4-48 UNF (MPN 10800200) from 3G Electric, which handles global logistics, customs clearance, and delivery to worldwide destinations. As a supplier of industrial equipment across 14 departments, 3G Electric provides genuine OSG taps and supports international procurement.

To select the correct STI tap, match the tap size and thread pitch to the insert's specifications, such as #4-48 UNF. Use a bottoming chamfer for blind holes and a spiral flute for chip evacuation. Always verify the thread class (e.g., H2 / 2B-3B) to ensure proper fit with the insert and mating fastener.