Hertel K017069AS Spiral Point Tap 10-24 Unc Left Hand Hss

Product Description

The HERTEL K017069AS is a left-hand spiral point tap designed for cutting internal threads in through-hole applications. It is ground from high speed steel with a bright finish and carries a 10-24 UNC thread form. The plug chamfer distributes cutting load across several leading threads, making it well-suited for machine tapping in CNC machining centers, drill presses, and tapping heads. With a 2-flute design and H3 thread limit, it produces threads to a 2B or 3B class of fit. Machinists and toolroom technicians install this tap when they need a left-hand thread for reverse-rotation assemblies or to counteract loosening from machine vibration.

This tap is intended for left-hand internal thread production in ferrous and non-ferrous materials where a 10-24 UNC thread specification is required. It is used in production machining, maintenance, and repair operations. The spiral point geometry pushes chips forward ahead of the tap, making it most effective in through-hole work rather than blind holes. It is a single-piece tool sold in individual quantities, appropriate for both job shop and production environments.

Key Features

• Left-hand thread direction for reverse-thread assemblies
• 10-24 UNC thread form with H3 thread limit for consistent tolerance control
• Plug chamfer for balanced cutting entry in through-hole applications
• 2-flute spiral point geometry pushes chips forward, reducing clogging
• High speed steel construction provides durability across common workpiece materials
• Bright finish with no coating for easy wear inspection
• Class of fit 2B/3B for standard fastener thread engagement

Compatibility

Designed as a direct-fit replacement spiral point tap for applications requiring a 10-24 UNC left-hand internal thread with a 2B or 3B class of fit and H3 thread limit.

Installation Notes

This tap is installed by qualified machinists or toolroom technicians using a tapping head, CNC machining center, or hand tap wrench configured for left-hand rotation. Ensure the spindle or driver rotates in the correct left-hand direction before engaging the workpiece. Use appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Inspect the tap for wear or chipping before each use and replace if the cutting edges show damage.