Hertel K099418AS Spiral Point Tap 5/8-11 Unc Hss

Product Description

The HERTEL K099418AS is a spiral point tap designed for cutting internal threads in through-hole applications. Built from high speed steel with a bright finish, this tap drives chips forward ahead of the cutting edge, preventing chip clogging in through-hole work. It cuts a 5/8-11 UNC thread profile to a Class 3B fit tolerance and carries an H3 thread limit for consistent, close-tolerance results. The bottoming chamfer style allows threading close to the bottom of a blind hole when used as a finishing tap after a taper or plug tap. Machinists and tool-and-die professionals install this tap in manual tapping operations or CNC tap cycles on ferrous and non-ferrous materials.

This tap is suited for production and maintenance machining environments where 5/8-11 UNC threads are required in through-hole configurations. The three-flute design provides a strong cross-section while maintaining adequate chip clearance. Right-hand cutting direction makes it compatible with standard right-hand threaded fastener applications. It is a single-piece tap sold individually, appropriate for job shops, maintenance facilities, and production floor use.

Key Features

• 5/8-11 UNC thread profile to Class 3B fit
• Spiral point geometry drives chips forward, ideal for through-hole tapping
• Bottoming chamfer for threading close to hole bottom
• H3 thread limit for close-tolerance, consistent thread production
• High speed steel construction for general-purpose cutting performance
• Bright finish with no coolant-through — suitable for use with flood or manual lubrication

Compatibility

Designed as a standard replacement or production tap for through-hole 5/8-11 UNC threaded applications in general machining operations.

Installation Notes

This tap should be installed in a tap holder or tapping chuck sized for the tap shank to ensure proper alignment and reduce the risk of tap breakage. Always apply appropriate cutting fluid for the workpiece material before and during tapping. Ensure the spindle or tapping arm is properly aligned perpendicular to the workpiece surface. Remove the tap carefully using a reverse rotation to avoid thread damage.