OSG Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute

This OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. Its spiral flute design evacuates chips upward, preventing clogging. The 1/4"-28 UNF thread size and bottoming chamfer make it suitable for precision threading applications in automotive, aerospace, and general manufacturing.

The OSG spiral flute tap MPN 0137401 has a thread size of 1/4"-28 UNF, with a H4 / 2B-3B tolerance class. It features 3 flutes and a bottoming chamfer. This tap is designed for threading blind holes in steel and stainless steel, ensuring accurate thread formation and chip evacuation.

3G Electric supplies OSG spiral flute taps like the 1/4"-28 UNF model (0137401) to customers worldwide. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. As a global industrial distributor, we source and deliver precision tooling for manufacturing needs.

Select an OSG spiral flute tap based on thread size, pitch, and material. For steel and stainless steel blind holes, use a bottoming chamfer tap like the 1/4"-28 UNF model. Ensure the tap's tolerance class (e.g., H4 / 2B-3B) matches your required thread fit. Always use appropriate cutting fluid and follow manufacturer speed/feed recommendations.