CHICAGO-LATROBE Spiral Flute Tap: 1/4"-28 UNF, H11 / 1B, 3 Flute, Semi-Bottoming Chamfer (MPN 313526)

A CHICAGO-LATROBE spiral flute tap is used for threading blind holes in materials like steel and aluminum. The spiral flute design pulls chips upward and out of the hole, preventing clogging and ensuring clean threads. It is ideal for production tapping in automotive, aerospace, and general manufacturing applications.

The CHICAGO-LATROBE 313526 is a 1/4"-28 UNF spiral flute tap with an H11 / 1B oversized tolerance, 3 flutes, and a semi-bottoming chamfer. It is designed for threading blind holes to a Class 1B fit, providing chip evacuation and thread accuracy in harder materials.

3G Electric supplies CHICAGO-LATROBE taps worldwide, handling full logistics and customs clearance for international orders. As a global industrial sourcing partner, we provide genuine CHICAGO-LATROBE cutting tools like the 313526 spiral flute tap to customers across 14 industrial departments. Contact us for delivery to your location.

For blind holes, choose a spiral flute tap with a semi-bottoming chamfer, like the CHICAGO-LATROBE 313526, to thread close to the hole bottom. Match the tap's thread size (e.g., 1/4"-28 UNF) and tolerance class (H11 / 1B) to your application. Use proper cutting fluid and peck tapping cycles to clear chips.