Hertel K008465AS25 Spiral Point Tap 3/8-24 Unf Tin Hss

Product Description

The HERTEL K008465AS25 is a spiral point plug tap designed for cutting right-hand internal threads in through-hole applications. Manufactured from high speed steel with a titanium nitride (TiN) coating, it produces 3/8-24 UNF threads and is suited for production environments where chip ejection ahead of the tap is critical. The TiN finish increases surface hardness and reduces friction, extending tool life in steel, cast iron, and similar ferrous materials. With an H1 thread limit, it holds tight tolerances for close-fit thread classes. Three flutes provide efficient chip flow in most general-purpose through-hole tapping operations.

This tap is used in machine shop, maintenance, and fabrication environments where 3/8-24 UNF threaded holes are required in through-hole workpieces. The plug chamfer style makes it suitable for starting in a hole and running through to full thread depth. It is appropriate for use in CNC machining centers, drill presses, and manual tapping operations. The spiral point geometry pushes chips forward rather than packing them behind the tap, making it especially effective in production tapping of ferrous materials.

Key Features

• 3/8-24 UNF thread form for fine-pitch through-hole applications
• High speed steel construction for durability in ferrous materials
• TiN coating reduces friction and extends tool life
• Plug chamfer for easy starting and full through-hole threading
• Spiral point geometry ejects chips forward, preventing packing
• H1 thread limit for tight tolerance control on close-fit thread classes

Compatibility

Designed as a standard spiral point plug tap for through-hole tapping of 3/8-24 UNF threads in compatible machine tool setups using straight or floating tap holders.

Installation Notes

This tap should be installed by a machinist or tool and die professional using a properly sized tap holder or floating chuck. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct 3/8-24 UNF tap drill diameter before beginning. Apply appropriate cutting fluid for the workpiece material to prevent galling and premature wear. Do not reverse the tap under power without confirming the machine setup supports it.