Hertel K011025AS Spiral Point Tap 5-40 Unc Hss

Product Description

The HERTEL K011025AS is a spiral point tap designed to cut internal threads in through-hole applications. It is a plug chamfer, right-hand tap manufactured from high-speed steel with a bright, uncoated finish. The spiral point geometry pushes chips forward ahead of the cutting zone, reducing clogging and allowing continuous feed in production environments. At a thread size of 5-40 UNC and a thread length of 0.625 inches, this tap is suited for small-fastener work in metal fabrication, instrument assembly, and light manufacturing. Machinists and toolroom technicians are the primary installers.

This tap is intended for use in ferrous and non-ferrous metals where a 5-40 UNC thread form is required in through-hole conditions. The plug chamfer provides a balance between starting ease and thread engagement, making it appropriate for both hand-tapping operations and machine tapping on drill presses, CNC machining centers, and tapping heads. It is not designed for blind-hole applications where chip evacuation is restricted.

Key Features

• Spiral point geometry pushes chips forward, suited for through-hole tapping
• 5-40 UNC thread form with right-hand thread direction
• High-speed steel construction for use in a range of metalworking materials
• Plug chamfer for balanced starting and thread engagement
• H3 thread limit for standard tolerance fits
• Bright, uncoated finish with no coolant-through requirement

Compatibility

Designed as a direct-fit replacement or standard tooling option for any application requiring a 5-40 UNC internal thread in through-hole workpieces. Compatible with standard tap holders and collets sized for the tap shank dimensions appropriate to this thread size.

Installation Notes

Installation is performed by machinists and toolroom technicians following standard tapping procedures. Secure the workpiece firmly before starting the tap to prevent misalignment. Use appropriate cutting fluid for the workpiece material to extend tap life and improve thread finish. Inspect the tap for wear or chipping before each use, as a damaged tap can produce out-of-tolerance threads or break in the workpiece.