Hertel K027800AS Straight Flute Tap M20 X 1.50 Plug Hss

Product Description

The HERTEL K027800AS is a straight flute tap designed for cutting Metric Fine internal threads in a range of workpiece materials. Sized at M20 x 1.50, this tap features four straight flutes and a plug chamfer that provides a gradual thread lead-in, making it suitable for through-hole and moderate depth blind-hole applications. Manufactured from High Speed Steel with a bright uncoated finish, it delivers solid cutting performance in ferrous and non-ferrous metals. The overall length is 4-15/32 inches, and the right-hand thread direction follows standard tapping convention. Thread limit is D6, indicating a Class 3 tolerance fit appropriate for general-purpose industrial threading work.

This tap is used in machining operations that require Metric Fine thread profiles, typically in manufacturing, maintenance, and repair environments. The straight flute geometry is best suited for through-holes or blind holes in materials that produce short, brittle chips. A plug chamfer start makes it a versatile choice for production tapping where a starting tap is not required. It is installed and operated by machinists and toolroom professionals using tapping heads, CNC machining centers, drill presses, or hand tap wrenches.

Key Features

• M20 x 1.50 Metric Fine thread size for precise pitch applications
• Four straight flutes optimized for short-chip materials and through-hole work
• Plug chamfer provides gradual thread engagement without a separate starting tap
• High Speed Steel construction offers good wear resistance across a range of metals
• Bright uncoated finish allows direct inspection of tool condition
• D6 thread limit suits Class 3 tolerance general industrial fits

Compatibility

Designed as an OEM-style replacement or standard toolroom tap for applications requiring M20 x 1.50 Metric Fine right-hand internal threads in through-hole or shallow blind-hole configurations.

Installation Notes

This tap is installed by machinists using a tap wrench, tapping head, or CNC spindle with appropriate tapping chuck. The workpiece should be properly clamped and the pilot hole drilled to the correct tap drill diameter for M20 x 1.50 before tapping begins. Use a suitable cutting fluid or tapping compound to extend tool life and improve thread finish. Ensure the tap is kept perpendicular to the workpiece surface to avoid thread form errors or tap breakage.