OSG Screw Thread Insert STI Tap: Straight Fute, M8x1.25 Metric, D3 / 4H-6H

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 M8x1.25 thread size, a D3 / 4H-6H tolerance class, and a straight flute design with 4 flutes. It is a general-purpose tap for screw thread inserts, with manufacturer part number 12800700. The tap is suitable for creating threads that accept standard M8 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 times on this M8x1.25 tap or other OSG tooling.

To select the correct OSG STI Tap, match the tap's thread size and pitch to the insert you plan to install. For M8x1.25 inserts, use this tap with D3 / 4H-6H tolerance. Ensure the tap is designed for the base material (e.g., aluminum or steel) and that your pre-drilled hole diameter matches OSG recommendations.