Eagle Cutting Tool HT-10000-12-T-I Hss Hand Taper Tap 1-12

Product Description

The EAGLE CUTTING TOOL HT-10000-12-T-I is a high-speed steel (HSS) hand taper tap designed for cutting internal threads in a variety of materials. Taper taps feature a gradual thread lead-in, typically 8 to 10 threads of taper, which distributes cutting forces along multiple teeth and makes thread starting easier in through-holes and open-work applications. This tap is ground to a 1-12 thread specification, meaning a 1-inch major diameter with a 12 threads-per-inch (TPI) pitch, a coarse unified national (UNC) series commonly found in heavy fastener and structural applications. Machinists, pipefitters, and maintenance technicians working with large-diameter fasteners will find this tap suited to bench, drill-press, and manual machine work.

This hand taper tap is used in metalworking, maintenance, and repair operations where a 1-12 threaded hole is required. Typical applications include creating or restoring threads in steel, cast iron, aluminum, and similar machinable materials. The taper entry makes it a preferred choice for starting threads in through-hole work or when threading by hand with a tap wrench or adjustable wrench. It is appropriate for job shop, industrial maintenance, and field repair use where large-diameter thread cutting is needed.

Key Features

• High-speed steel (HSS) construction provides hardness and wear resistance for threading steel, iron, and non-ferrous metals
• Taper thread lead distributes cutting load across multiple teeth for easier thread starting
• 1-12 thread specification suits large-diameter, coarse-pitch fastener and structural applications
• Hand tap design compatible with standard tap wrenches and T-handle drivers
• Minimum order quantity of 1 allows single-unit purchase for low-volume or repair use

Compatibility

Designed as an OEM-style cutting tool replacement for any application requiring a 1-12 UNC hand taper tap in HSS. Fits standard tap holders and wrenches sized for large-diameter hand taps.

Installation Notes

This tap is installed by machinists or maintenance technicians using a tap wrench or equivalent hand driver. Before tapping, ensure the workpiece is securely clamped and the pilot hole is drilled to the correct tap drill size for a 1-12 thread. Apply cutting fluid throughout the tapping process to reduce heat and extend tool life. Back the tap off periodically to break chips and prevent binding or tap breakage.