Eagle Cutting Tool HT-12500-12-T-I Hss Hand Taper Tap

Product Description

The EAGLE CUTTING TOOL HT-12500-12-T-I is a high-speed steel (HSS) hand taper tap designed for cutting internal threads in metal workpieces. This tap produces a 1-1/4 inch diameter thread at 12 threads per inch (TPI), following the Unified National Coarse/Fine thread standard at this size. The taper lead — typically 7 to 10 threads of gradual entry — reduces cutting resistance and makes it well-suited for starting threads in through-holes or in materials that require a guided entry. At 0.31 pounds, it is a lightweight, hand-use tool appropriate for machine shops, plumbing rough-in, pipefitting work, and general metalworking applications.

This tap is used when threading larger-diameter holes in steel, iron, aluminum, brass, or similar machinable metals. The taper style is the standard starting tap for hand-tapping operations, providing controlled thread engagement from the first pass. It is commonly used by machinists, pipefitters, plumbers, and maintenance technicians working on equipment housings, manifolds, flanges, and structural connections requiring a 1-1/4 inch 12 TPI thread. The import designation indicates offshore manufacture, making it a cost-effective option for general-purpose or higher-volume threading work.

Key Features

• HSS construction provides good hardness and wear resistance for threading steel and non-ferrous metals
• Taper lead design eases thread entry and reduces torque demand at start of cut
• 1-1/4 inch diameter, 12 TPI thread specification for large-diameter fastener and fitting applications
• Hand-tap configuration — compatible with standard tap wrenches and T-handle drivers
• Lightweight at 0.31 pounds for easy single-hand operation

Compatibility

Designed as a general-purpose hand taper tap for 1-1/4 inch 12 TPI threading applications. Compatible with standard tap wrenches sized for large-shank taps.

Installation Notes

Use with an appropriately sized tap wrench; do not use impact drivers or power tools unless the tap is rated for machine use. Drill the correct tap drill size for 1-1/4 inch 12 TPI threads before starting — using an undersized or oversized pilot hole will damage the tap or produce poor threads. Apply cutting oil throughout the threading operation to extend tap life and improve thread quality. Back off a half-turn periodically to break chips, especially in blind holes or ductile materials.

Technical Specifications

• Thread Diameter: 1-1/4 inches
• Threads Per Inch (TPI): 12
• Tap Type: Hand Taper
• Material: High-Speed Steel (HSS)
• Weight: 0.31 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-12500-12-T-I