Eagle Cutting Tool HT-172-P-I Hss Hand Plug Tap 1-72

Product Description

The EAGLE CUTTING TOOL HT-172-P-I is a 1-72 high-speed steel (HSS) hand plug tap designed for cutting internal threads in metal workpieces. The plug chamfer — typically 3 to 5 threads — makes it well-suited for threading through-holes and starting threads in blind holes where adequate depth allows. At 0.31 pounds, it is lightweight and balanced for hand tapping with a standard tap wrench. Machinists, tool-and-die workers, and maintenance technicians rely on this style of tap for precision threading in small-diameter fastener applications.

The 1-72 thread designation indicates a 1-inch nominal diameter at 72 threads per inch (UNF fine thread series), a specification common in precision instrument work, electronics assemblies, optical equipment, and small mechanical components. This tap is suited for use in ferrous and non-ferrous metals where a clean, accurate fine-pitch thread is required. It is appropriate for both shop floor and field maintenance use.

Key Features

• 1-72 UNF fine thread form for precision small-diameter threading
• High-speed steel (HSS) construction provides hardness and wear resistance for threading steel, aluminum, brass, and similar materials
• Plug chamfer style starts threads easily in through-holes and sufficiently deep blind holes
• Lightweight at 0.31 pounds for controlled hand tapping
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed as a standard hand plug tap for use with any tap wrench accepting the appropriate square shank drive. Suitable for threading 1-72 UNF holes in metal workpieces across general machining, maintenance, and precision assembly applications.

Installation Notes

This tap is intended for use by machinists, maintenance technicians, and experienced tradespeople performing hand tapping operations. Always secure the workpiece before tapping and use the appropriate cutting fluid for the material being threaded. Back the tap off periodically to break chips and prevent tap breakage, especially in blind holes. Inspect the tap for wear or damage before each use — a chipped or worn tap can damage threads or seize in the workpiece.

Technical Specifications

• Thread Size: 1-72
• Thread Series: UNF (Unified Fine)
• Tap Type: Hand Plug
• Material: High-Speed Steel (HSS)
• Weight: 0.31 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-172-P-I