OSG Screw Thread Insert STI Tap: Spiral Fute, M18x2.5 Metric, D5 / 4H-6H, 4 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 automotive, aerospace, and general manufacturing to repair or reinforce threads in softer materials like aluminum or cast iron.

This OSG STI Tap has a metric M18x2.5 thread size with a D5 / 4H-6H tolerance class. It features 4 spiral flutes for efficient chip evacuation and is made from high-speed steel. The manufacturer part number is 10901200, and it is designed for use with screw thread inserts.

You can source OSG 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 this M18x2.5 spiral-flute tap.

To select the correct OSG STI Tap, match the tap's thread size and pitch to the insert you plan to use. For M18x2.5 threads, choose a tap with the same designation and a tolerance class like D5 / 4H-6H. Ensure the tap material suits the workpiece—high-speed steel works for general-purpose threading in steel or aluminum.