Hertel K027781AS25 Straight Flute Tap M16x2 Tin Hss

Product Description

The HERTEL K027781AS25 is a straight flute tap designed for cutting M16 x 2.00 metric coarse internal threads in a wide range of materials. Built from high speed steel (HSS) and finished with a titanium nitride (TiN) coating, this tap delivers extended tool life and reduced friction during threading operations. The plug chamfer style eases entry and makes it suitable for through-hole applications. With a 6H class of fit and D7 thread limit, it produces threads within standard tolerance for general-purpose metric fastener assemblies. Machinists, toolroom technicians, and maintenance trades rely on this tap for production and repair threading work.

This tap is suited for through-hole threading in materials including steel, cast iron, aluminum, and similar machinable metals. The straight flute design works best in these shorter-chipping materials where chip evacuation along the flute length is reliable. With a plug chamfer, it is commonly used at the start of a through-hole threading cycle on manual machines, drill presses, or CNC machining centers. The right-hand thread direction matches standard M16 x 2.00 fastener specifications, making it a direct fit for metric coarse repair and production applications.

Key Features

• M16 x 2.00 metric coarse thread size for standard metric fastener compatibility
• High speed steel construction for strength across a broad range of workpiece materials
• TiN coating reduces friction and increases surface hardness for extended tool life
• Plug chamfer provides 3-5 thread lead-in, ideal for through-hole threading
• 6H class of fit and D7 thread limit for general-purpose metric tolerance requirements
• 4 straight flutes optimized for short-chipping materials where chip flow is manageable

Compatibility

Designed as a standard straight flute plug tap for through-hole M16 x 2.00 metric coarse threading operations on manual and CNC equipment with a compatible tap holder or chuck.

Installation Notes

This tap is installed by a machinist or toolroom technician using a tap wrench, tapping head, or CNC rigid tapping cycle with an appropriate holder. Ensure the workpiece is securely clamped and the pilot hole diameter is correct for M16 x 2.00 metric coarse threads before starting. Use a suitable cutting fluid or tapping compound to lubricate the tap and aid chip evacuation. Inspect the tap for wear or chipping before each use and never force a tap against resistance, as this can cause breakage inside the workpiece.