Eagle Cutting Tool HT-640-P-D 6-40 Hss Hand Plug Tap

Product Description

The EAGLE CUTTING TOOL HT-640-P-D is a 6-40 high-speed steel (HSS) hand plug tap manufactured in the USA. It is designed to cut internal threads by hand in a range of materials including steel, aluminum, and plastics. The plug chamfer — typically 3 to 5 threads — makes this tap suitable for through-holes and most general-purpose threading applications. Machinists, maintenance technicians, and trade professionals use plug taps as the standard starting choice when threading holes that have clear exit paths on both sides. At 0.08 pounds, it is a compact, lightweight tool sized for 6-40 unified fine (UNF) thread work.

This tap is used wherever 6-40 UNF internal threads are required, including light mechanical assemblies, instrument panels, electrical enclosures, and small fastener applications common in HVAC controls, electrical work, and general fabrication. The 6-40 thread designation indicates a No. 6 screw diameter with 40 threads per inch, a fine-thread pitch frequently encountered in precision and light-duty fastening scenarios. It is suited for bench work and hand-tapping operations in shop, field, and maintenance environments.

Key Features

• 6-40 UNF thread profile for fine-pitch internal threading
• High-speed steel (HSS) construction provides hardness and wear resistance across a broad range of workpiece materials
• Plug chamfer style accommodates through-hole threading and general-purpose hand tapping
• USA manufactured for consistent dimensional accuracy and thread form
• Lightweight at 0.08 pounds, easy to handle in confined spaces

Compatibility

Designed for hand tapping applications requiring 6-40 UNF internal threads. Compatible with standard tap handles and T-wrenches sized for No. 6 taps.

Installation Notes

This tap is intended for hand operation using a tap wrench or T-handle; do not drive it with power tools unless the tool is specifically rated for hand taps. Secure the workpiece firmly before starting, ensure the tap enters the hole square to the surface, and apply a suitable cutting fluid appropriate for the workpiece material. Back off periodically to break chips and prevent tap breakage. Worn or broken taps should be replaced rather than forced.

Technical Specifications

• Thread Size: 6-40 UNF
• Tap Type: Hand Plug Tap
• Material: High-Speed Steel (HSS)
• Country of Origin: USA
• Weight: 0.08 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-640-P-D