Hertel K008484AS25 Spiral Point Tap 7/16-14 Unc Tin

Product Description

The HERTEL K008484AS25 is a spiral point plug tap designed for cutting right-hand internal threads in through-hole applications. Built from high-speed steel with a titanium nitride (TiN) coating, this tap offers increased surface hardness and reduced friction during cutting. It is configured to produce 7/16-14 UNC threads and features a 3-flute geometry with a plug chamfer that distributes cutting load across several leading threads. The H3 thread limit designation means the tap is ground to produce threads within a controlled tolerance range suited for standard commercial fits. Machinists and tool-and-die professionals use this tap in manual and CNC tapping operations.

This tap is suited for through-hole tapping in a range of materials including low-carbon steel, aluminum, and other machinable metals where a plug chamfer and spiral point geometry are appropriate. The spiral point design pushes chips ahead of the tap into the hole rather than packing them around the flutes, making it well suited for production environments where chip management and consistent thread quality are priorities. It ships individually and is intended for single-unit use in machine tapping setups.

Key Features

• 7/16-14 UNC thread size for standard unified coarse thread applications
• 3-flute spiral point geometry pushes chips forward for efficient through-hole tapping
• Plug chamfer provides gradual thread engagement and distributes cutting forces
• High-speed steel construction provides toughness across a range of workpiece materials
• TiN coating increases surface hardness and extends tool life in production tapping
• H3 thread limit delivers controlled tolerance fit for standard commercial thread requirements

Compatibility

Designed as an OEM-style replacement or direct substitution for 7/16-14 UNC spiral point plug taps used in standard machine tapping chucks and holders that accept the corresponding tap shank size.

Installation Notes

This tap is intended for installation by machinists in machine tapping applications using a tapping chuck, CNC machining center, or drill press with a tapping attachment. Always ensure the spindle speed and feed rate are appropriate for the workpiece material and tap diameter before beginning the tapping cycle. Secure the workpiece firmly and confirm the tap is properly aligned with the pre-drilled pilot hole to prevent tap breakage. Follow applicable shop safety procedures and manufacturer guidelines for cutting fluid selection when tapping ferrous or non-ferrous materials.