Hertel K011532AS Spiral Point Tap 1/4-20 Unc Hss Plug

Product Description

The HERTEL K011532AS is a spiral point tap designed for cutting internal threads in through-holes. Built from high-speed steel with a bright uncoated finish, it produces right-hand 1/4-20 UNC threads and is sized to the H7 thread limit for controlled fit. The spiral point geometry pushes chips forward ahead of the tap, keeping the flutes clear and reducing the risk of chip packing in production and maintenance threading operations. With a 1-inch thread length and 2 flutes, this tap suits machine tapping in drill presses, CNC machining centers, and tapping attachments across metalworking and MRO applications.

This tap is suited for threading through-holes in steel, cast iron, aluminum, and similar machinable materials. The plug chamfer style provides a gradual entry over several lead threads, making it the standard choice for most through-hole tapping work in manufacturing, maintenance, and general fabrication. The 1/4-20 UNC thread form is one of the most common fastener sizes in North American trade applications, including HVAC panel assembly, electrical enclosures, and mechanical equipment repair.

Key Features

• Spiral point geometry pushes chips forward for clean through-hole tapping
• High-speed steel construction handles standard ferrous and non-ferrous materials
• H7 thread limit for consistent fit within tolerance
• Plug chamfer for smooth thread entry over multiple lead threads
• Right-hand thread direction, 1/4-20 UNC thread form
• Bright uncoated finish suitable for use with cutting oil or tapping fluid

Compatibility

Designed as an OEM-style replacement or direct-use spiral point tap for 1/4-20 UNC through-hole threading applications in standard tapping chucks, holders, and CNC tooling with a 0.255-inch shank diameter.

Installation Notes

Installation is performed by machinists and maintenance technicians using a tapping attachment, drill press, or CNC machine with a synchronized tapping cycle. Always use an appropriate cutting fluid or tapping compound to extend tool life and improve thread quality. Ensure the workpiece is securely fixtured before tapping. Do not reverse-cycle a spiral point tap in a blind hole, as this style is intended for through-hole applications only.