OSG Spiral-Flute Extension Tap 7/8"-9 UNC H6 4 Flute Modified Bottoming Chamfer

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

The OSG Extension Tap has a thread size of 7/8"-9 UNC with a tolerance of H6 for the tap and 2B-3B for the threaded hole. It features 4 flutes, a modified bottoming chamfer, and a spiral-flute design for chip evacuation. The manufacturer part number is 1652504908, and it is designed for multiple materials.

You can source the OSG Extension Tap 7/8"-9 UNC 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 provide reliable sourcing for this OSG tap and other industrial tooling needs.

To select the correct OSG extension tap, match the thread size (e.g., 7/8"-9 UNC), tolerance class (H6 for tap, 2B-3B for hole), and chamfer type to your application. For deep or blind holes, choose a spiral-flute design with a modified bottoming chamfer. Verify material compatibility and ensure the tap length reaches the required depth. Consult OSG's technical data for guidance.