Eagle Cutting Tool HT-8750-9-T-I 7/8-9 Hss Hand Taper Tap

Product Description

The EAGLE CUTTING TOOL HT-8750-9-T-I is a 7/8-9 high-speed steel (HSS) hand taper tap designed for cutting internal threads in a wide range of materials. The taper tap features a gradual lead that eases thread-cutting entry, making it well suited for starting threads in through holes or when threading from scratch. Constructed from HSS, it provides the hardness and wear resistance needed for consistent performance across steel, cast iron, aluminum, and similar workpiece materials. The 7/8-9 designation indicates a 7/8-inch nominal diameter with 9 threads per inch (TPI) in the Unified National Coarse (UNC) thread form.

This tap is intended for hand-tapping operations performed by machinists, maintenance technicians, pipefitters, and general metalworkers in industrial, commercial, and maintenance repair operations (MRO) environments. It is used wherever a 7/8-9 UNC internal thread needs to be created or restored by hand using a tap wrench or adjustable wrench with a square-drive tap holder. It is appropriate for both production shops and field repair situations where power tapping equipment is not available or practical.

Key Features

• 7/8-9 UNC thread form for standard Unified National Coarse applications
• High-speed steel (HSS) construction for durability and wear resistance
• Taper lead design eases thread-entry and reduces tool breakage risk
• Suitable for hand-tapping a variety of metals including steel, cast iron, and aluminum
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed as an OEM-style replacement and standard hand tap for any application requiring a 7/8-9 UNC internal thread in metalworking, maintenance, or fabrication work.

Installation Notes

This tap is installed using a standard hand tap wrench sized to accept the square shank drive. Always apply cutting fluid appropriate to the workpiece material to reduce heat buildup and extend tap life. Ensure the tap is started square to the hole to prevent cross-threading or breakage. Follow applicable shop safety practices, including securing the workpiece and using proper eye protection.

Technical Specifications

• Thread Size: 7/8-9 UNC
• Thread Standard: Unified National Coarse (UNC)
• Tap Type: Hand Taper Tap
• Material: High-Speed Steel (HSS)
• Weight: 0.31 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-8750-9-T-I