OSG Spiral Flute Tap: #4-40 UNC, H2 / 2B-3B, 3 Flute

The OSG spiral flute tap #4-40 UNC is designed for threading blind holes in ferrous and non-ferrous materials. Its spiral flute design lifts chips upward, preventing clogging and ensuring clean threads. It is commonly used in automotive, aerospace, and general manufacturing applications where precise internal threading is required.

The OSG spiral flute tap #4-40 UNC has a thread size of #4-40 UNC, a H2 / 2B-3B tolerance class, and a modified bottoming chamfer. It features 3 flutes for efficient chip evacuation. The manufacturer part number is 2906408. This tap is suitable for general-purpose threading in blind holes.

You can source the OSG spiral flute tap #4-40 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 supply genuine OSG taps for industrial applications.

To select the correct OSG spiral flute tap for blind holes, match the thread size (e.g., #4-40 UNC) and tolerance class (e.g., H2 / 2B-3B) to your application. Choose a modified bottoming chamfer for threading close to the hole bottom. Ensure the tap material suits your workpiece—OSG taps are available for various materials.