OSG Extension Tap: M20x2.5 Metric, D7 / 4H-6H, 4 Flute

The OSG Extension Tap M20x2.5 is used for threading blind or deep holes in multiple materials, including steel and cast iron. Its spiral-flute design evacuates chips upward, preventing clogging. The modified bottoming chamfer allows threading close to the bottom of a hole, making it ideal for automotive and general manufacturing applications.

The OSG Extension Tap has a metric thread size of M20x2.5, a D7 / 4H-6H tolerance class, and a modified bottoming chamfer. It features 4 spiral flutes for efficient chip evacuation. The manufacturer part number is 1652008708. This tap is designed for threading multiple materials, including steel and cast iron.

You can source the OSG Extension Tap M20x2.5 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. We supply genuine OSG taps to support your manufacturing operations.

To select the correct OSG extension tap, match the thread size (e.g., M20x2.5) and tolerance class (e.g., D7 / 4H-6H) to your application. For deep or blind holes, choose a spiral-flute design with a modified bottoming chamfer to reach near the hole bottom. Ensure the tap length provides sufficient reach for your workpiece depth.