Hertel K008336AS Spiral Point Tap 1/4-20 Unc Hss

Product Description

The HERTEL K008336AS is a spiral point tap designed for cutting internal threads in through-hole applications. Manufactured from high-speed steel with a bright, uncoated finish, this tap features a plug chamfer and two flutes that push chips ahead of the cutting edge, keeping the flutes clear during operation. It is sized for 1/4-20 UNC threads and built to a 2B class of fit with an H5 thread limit, making it suitable for standard tolerance threading work in metal fabrication, maintenance, and production environments. Right-hand thread direction confirms conventional forward-cutting operation.

This tap is used in general metalworking and machining applications where through-hole tapping is required. The plug chamfer style suits production tapping in materials where chip evacuation forward through the hole is practical. Typical applications include threading steel, aluminum, and similar materials in job shop, maintenance, and light manufacturing settings. The 1/4-20 UNC thread form is one of the most common inch-series fastener standards in North American trade work, making this tap a frequent tool for HVAC, electrical, and mechanical assembly technicians as well as machinists.

Key Features

• Spiral point geometry pushes chips forward and out of the hole, reducing clogging in through-hole threading
• High-speed steel construction provides good wear resistance for general-purpose tapping
• Plug chamfer (approximately 3-5 thread lead) allows easy starting and is the standard choice for through-hole work
• 2B class of fit and H5 thread limit deliver standard tolerance threads compatible with common 1/4-20 fasteners
• Right-hand cutting direction for conventional forward-rotation tapping
• Bright, uncoated finish suitable for use with cutting fluid across a range of workpiece materials

Compatibility

Designed as an OEM-style replacement or standard tooling option for any application requiring a 1/4-20 UNC, 2B class of fit, spiral point plug tap in high-speed steel.

Installation Notes

This tap is installed by machinists and trade technicians using a tap wrench, tapping head, or machine spindle. Always use an appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Ensure the workpiece is secured and the tap is started perpendicular to the hole to avoid tap breakage. Do not reverse the tap until chip packing is felt, as the spiral point design is intended to push chips forward continuously through the hole.