OSG 1/2"-13 UNC Spiral-Flute Extension Tap

The OSG Extension Tap 1769101 is designed for threading blind holes in steel and stainless steel. Its spiral-flute design evacuates chips upward, preventing clogging, while the extended reach allows access to deep or recessed areas. Common applications include automotive, aerospace, and general manufacturing where precise internal threads are required.

This OSG tap has a 1/2"-13 UNC thread size with an H3 / 2B-3B tolerance class. It features 3 flutes and a modified bottoming chamfer for threading close to the bottom of blind holes. The spiral-flute design is optimized for steel and stainless steel. The manufacturer part number is 1769101.

You can source the OSG Extension Tap 1769101 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine OSG taps for international procurement needs.

Select an OSG extension tap based on thread size, pitch, and material. For steel and stainless steel, choose a spiral-flute design like the 1769101 to manage chip evacuation in blind holes. Verify the thread class (e.g., H3 / 2B-3B) matches your required fit. Ensure the tap's reach is sufficient for the hole depth.