OSG Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute

The OSG spiral flute tap 2939200 is designed for threading blind holes in materials such as steel and stainless steel. Its spiral flute design evacuates chips upward, preventing clogging. It is commonly used in automotive, aerospace, and general manufacturing applications where precise UNF threads are required.

This OSG tap has a 7/8"-14 UNF thread size, H4 / 2B-3B tolerance, 4 flutes, and a modified bottoming chamfer. The H4 limit ensures precise thread fit for 2B-3B classes. The manufacturer part number is 2939200. It is a general-purpose spiral-flute tap for blind-hole threading.

3G Electric supplies the OSG spiral flute tap 2939200 worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We source and deliver this tap to support your manufacturing operations.

To select the correct OSG spiral flute tap, match the thread size (e.g., 7/8"-14 UNF) and tolerance class (H4 / 2B-3B) to your application. For blind holes, choose a modified bottoming chamfer. Ensure the tap material suits your workpiece. OSG taps are designed for precision threading in steel and alloys.