Eagle Cutting Tool HT-11250-12-P-I Hss Hand Plug Tap 1-1/8-12

Product Description

The EAGLE CUTTING TOOL HT-11250-12-P-I is a high-speed steel (HSS) hand plug tap designed to cut internal threads in metal workpieces. This plug tap features a 1-1/8 inch diameter with a 12 threads-per-inch (TPI) thread pitch, making it suited for producing unified national coarse-adjacent inch-series threads by hand or with a tap wrench. The plug chamfer style — typically 3 to 5 threads of lead — provides a balance between easy starting and full thread form, making it one of the most commonly used tap styles across production and maintenance work. HSS construction offers adequate hardness and wear resistance for threading steel, cast iron, aluminum, and similar materials.

This tap is used in metalworking, maintenance, and repair applications where 1-1/8 inch-12 TPI internal threads are required. It is appropriate for threading through-holes or blind holes in low-carbon steel, stainless, aluminum, and other machinable metals. Typical users include machinists, millwrights, pipefitters, and maintenance technicians working in industrial, commercial, or field repair environments. Hand tapping with a standard tap wrench or T-handle is the intended method of use.

Key Features

• 1-1/8 inch diameter, 12 TPI thread specification for larger-diameter fastener applications
• High-speed steel (HSS) construction provides hardness and wear resistance across common metals
• Plug chamfer style balances easy thread starting with full thread engagement
• Designed for hand tapping with a tap wrench or T-handle driver
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed as an OEM-style replacement or standard tooling addition for any application requiring 1-1/8 inch-12 TPI hand-cut internal threads in machinable metal workpieces.

Installation Notes

A licensed machinist or qualified maintenance technician should perform tapping operations. Secure the workpiece firmly before beginning; use a tap wrench sized appropriately for a 1-1/8 inch tap to maintain controlled torque. Apply cutting fluid or tapping oil throughout the operation to reduce heat and extend tool life. Back the tap out periodically to break chips, especially in blind-hole applications, to prevent tap breakage.

Technical Specifications

• Thread Diameter: 1-1/8 inch
• Thread Pitch: 12 TPI
• Tap Style: Plug (Hand)
• 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-P-I