Hertel K008331AS25 Spiral Point Tap 1/4-20 Unc Tin

Product Description

The HERTEL K008331AS25 is a spiral point tap designed for cutting right-hand internal threads in through-hole applications. Built from high-speed steel with a titanium nitride (TiN) coating, it produces 1/4-20 UNC threads and is configured with a plug chamfer for general-purpose tapping in a variety of materials. The two-flute spiral point geometry pushes chips forward ahead of the cutting edge, reducing chip clogging in through-hole work. The H2 thread limit provides a close tolerance fit suitable for standard fastener applications. Machinists, maintenance technicians, and tool-and-die professionals are the primary users of this tap.

This tap is suited for through-hole threading in ferrous and non-ferrous metals, plastics, and similar machinable materials in both production and job-shop environments. The plug chamfer makes it appropriate for hand tapping or machine tapping operations where the tap can be introduced to a pre-drilled hole and driven through to full thread depth. The TiN coating reduces friction and extends tool life in repetitive threading operations. It is a standard single-piece unit with a minimum order quantity of one.

Key Features

• 1/4-20 UNC thread form with right-hand cut for standard fastener thread production
• Spiral point geometry pushes chips forward, making it effective for through-hole applications
• High-speed steel construction provides toughness and wear resistance across a range of materials
• TiN coating reduces friction and heat buildup, extending tool life
• Plug chamfer allows entry into pre-drilled holes for general-purpose tapping
• H2 thread limit ensures close-tolerance thread fit for standard assembly requirements

Compatibility

Designed as a general-purpose spiral point tap for through-hole tapping operations requiring a 1/4-20 UNC thread form in standard machine tapping and hand tapping setups.

Installation Notes

This tap is installed by machinists or maintenance technicians using a tap wrench, tapping head, or CNC machine spindle. Always ensure the pilot hole is drilled to the correct tap drill diameter for a 1/4-20 UNC thread before tapping. Apply appropriate cutting fluid to reduce heat and extend tool life. Power down and de-energize any machine tool before manually changing or inspecting the tap.