Eagle Cutting Tool HT-11250-12-T-I Hss Hand Taper Tap

Product Description

The EAGLE CUTTING TOOL HT-11250-12-T-I is a high-speed steel (HSS) hand taper tap designed to cut 1-1/8 inch diameter threads at 12 threads per inch (TPI). Taper taps lead with a gradual thread form across the first several threads, making them the standard starting choice for threading new holes in metal — including steel, iron, aluminum, and similar materials. This is an import-grade tap suited for general threading work in maintenance, fabrication, and trade shop environments. Machinists, pipefitters, millwrights, and general tradespeople reaching for a reliable 1-1/8-12 thread profile will find it appropriate for production and repair tasks alike.

This tap is intended for hand tapping applications where the operator uses a tap wrench to drive the tool through a pre-drilled hole. The 1-1/8-12 thread designation is a Unified National Fine (UNF) series profile, commonly found in heavy-duty fastener applications, large-diameter fittings, and mechanical assemblies that require a finer thread pitch at this size. It is appropriate for through-holes and blind holes where a taper-lead starting tap is the preferred method before following up with a plug or bottoming tap if full thread depth to the bottom of a blind hole is required.

Key Features

• High-speed steel (HSS) construction provides hardness and wear resistance for threading ferrous and non-ferrous metals
• Taper lead (chamfer across approximately 8-10 threads) allows easy thread starting and alignment in new holes
• 1-1/8 inch diameter, 12 TPI Unified National Fine thread profile
• Hand tap design intended for use with a standard tap wrench
• Import-grade construction suited for general-purpose maintenance and fabrication use

Compatibility

Designed as a general-purpose hand taper tap for cutting 1-1/8-12 UNF threads in pre-drilled holes across a range of metal workpieces and assemblies requiring this thread specification.

Installation Notes

Always secure the workpiece before tapping and use a calibrated tap wrench to maintain perpendicular alignment with the hole. Apply a suitable cutting fluid or tapping oil to extend tap life and improve thread quality. Back the tap off periodically to break chips and clear debris, especially in blind holes. Discard any tap showing signs of chipping, cracking, or excessive wear to avoid thread damage or tap breakage in the workpiece.

Technical Specifications

• Thread Size: 1-1/8 inch
• Thread Pitch: 12 TPI
• Thread Form: Unified National Fine (UNF)
• Tap Type: Hand Taper
• Material: High-Speed Steel (HSS)
• Weight: 0.82 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-11250-12-T-I