Hertel K027798AS Spiral Point Tap M20 X 2.5 Metric Coarse

Product Description

The HERTEL K027798AS is a spiral point tap designed for cutting metric coarse internal threads in through-hole applications. Manufactured from high speed steel with a bright finish, this tap drives chips forward ahead of the cutting zone, reducing clogging and allowing faster feed rates in production environments. It features a plug chamfer for progressive thread engagement and a 6H thread class tolerance suitable for general-purpose metric fastener fits. Machinists, tool-and-die makers, and CNC machine operators install this tap in manual and power-driven tapping operations for threading steel, cast iron, and similar materials.

This tap is suited for through-hole threading in M20 x 2.5 metric coarse applications across manufacturing, fabrication, and maintenance operations. The spiral point geometry makes it particularly effective in production tapping where continuous chip evacuation is critical. It is commonly used in machine shops, job shops, and industrial maintenance settings where metric thread standards are required. The right-hand thread direction and D7 thread limit make it compatible with standard M20 metric fastener assemblies.

Key Features

• Spiral point geometry drives chips forward, ideal for through-hole threading
• Plug chamfer provides progressive thread engagement for smoother cutting action
• High speed steel construction for durability in ferrous and non-ferrous materials
• 6H class of fit meets general-purpose metric thread tolerance requirements
• D7 thread limit for consistent, accurate thread production
• Bright finish with no coating for easy wear inspection during tool life monitoring

Compatibility

Designed for cutting M20 x 2.5 metric coarse right-hand internal threads in through-hole workpieces. Suitable for use in manual tap handles, tapping heads, and CNC machining centers configured for rigid or floating tap holders.

Installation Notes

This tap is installed by qualified machinists or tool operators in machine shop environments. Ensure the spindle or tapping head is properly aligned with the drilled pilot hole before engaging the tap to avoid thread distortion or tool breakage. Apply appropriate cutting fluid for the workpiece material and verify correct pilot hole diameter for M20 x 2.5 threads before tapping. Reverse the tap periodically in manual operations to break chips if the spiral point action is not sufficient for the material being threaded.