OSG Spiral Flute Tap: 7/16"-14 UNC, H3 / 2B-3B, 3 Flute

The OSG spiral flute tap 0138308 is designed for threading blind holes in steel and stainless steel. Its spiral flute design evacuates chips upward, preventing clogging, while the bottoming chamfer allows threading close to the hole bottom. It is commonly used in automotive, aerospace, and general manufacturing applications.

This OSG tap has a thread size of 7/16"-14 UNC, with a H3 / 2B-3B tolerance class. It features 3 flutes and a bottoming chamfer. The manufacturer part number is 0138308. It is designed for threading steel and stainless steel in blind-hole applications.

3G Electric supplies OSG taps 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 genuine OSG tooling to support your manufacturing operations anywhere in the world.

Select an OSG tap based on thread size, pitch, hole type (blind or through), and material. For blind holes in steel, a spiral flute tap with bottoming chamfer, like the 0138308, is ideal. Ensure the tap tolerance (e.g., H3 / 2B-3B) matches your required thread class. Always use appropriate cutting fluid for steel.