Eagle Cutting Tool HT-544-B-I Hss Hand Bottom Tap 5-44

Product Description

The EAGLE CUTTING TOOL HT-544-B-I is a 5-44 high-speed steel (HSS) hand bottom tap designed for threading blind holes to the full depth of a bored or drilled cavity. As a bottom tap, it produces threads close to the bottom of a hole where starter or plug taps cannot reach. The HSS construction provides hardness and wear resistance suitable for threading steel, aluminum, brass, and similar materials. Machinists, tool-and-die workers, and maintenance technicians use this tap for precision threading operations in both production and repair environments.

This tap is suited for use in manual tapping operations with a standard tap wrench or tapping handle. The 5-44 thread designation indicates a No. 5 screw size with 44 threads per inch, a fine-pitch unified national thread form commonly found in instrument work, small fastener assemblies, and precision mechanical components. It is appropriate for both light industrial and bench-level maintenance work requiring fine-thread tapped holes.

Key Features

• Bottom tap geometry threads blind holes to near-full depth
• HSS construction offers hardness and heat resistance for extended tool life
• 5-44 UNF thread form for fine-pitch precision threading applications
• Compatible with standard tap wrenches and T-handle tap drivers
• Lightweight at 0.31 pounds for easy single-hand use

Compatibility

Designed as a standard hand tap for use in any application requiring a 5-44 UNF threaded blind or through hole.

Installation Notes

Always secure the workpiece before tapping and use a proper tap wrench to maintain axial alignment. Apply appropriate cutting fluid to the tap and workpiece to reduce friction and extend tool life. Back the tap out periodically to break chips and clear the flutes, particularly in blind-hole applications. Inspect the tap for wear or chipping before each use to avoid thread damage or tap breakage.

Technical Specifications

• Thread Size: 5-44
• Thread Form: UNF (Unified National Fine)
• Tap Type: Hand Bottom Tap
• Material: High-Speed Steel (HSS)
• Weight: 0.31 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-544-B-I