Eagle Cutting Tool HT-440-P-D 4-40 Hss Hand Plug Tap

Product Description

The EAGLE CUTTING TOOL HT-440-P-D is a 4-40 high-speed steel (HSS) hand plug tap manufactured in the USA. This tap is designed to cut internal threads in through-holes and moderately deep blind holes, producing clean 4-40 UNC threads in metal, plastic, and other machinable materials. The plug chamfer — typically 3 to 5 threads of taper — makes it the most common tap style for general-purpose threading work. At 0.04 pounds, it is a compact, lightweight tool suited for benchtop and field use by machinists, maintenance technicians, and trade professionals who need reliable hand-tapping capability in small-diameter fastener applications.

The HT-440-P-D is used wherever 4-40 UNC threaded holes are required, including electrical enclosures, HVAC control panels, instrumentation housings, and light mechanical assemblies. The 4-40 thread size is a standard in small-fastener applications across commercial and residential trade work. This tap is intended for hand-tapping operations using a standard tap wrench and is not designed for CNC or power-feed use without proper setup.

Key Features

• 4-40 UNC thread form for small-diameter fastener applications
• Plug chamfer profile suitable for through-holes and moderately deep blind holes
• High-speed steel (HSS) construction for durability across metal and plastic workpieces
• USA manufactured
• Lightweight at 0.04 pounds — easy to carry in a service kit

Compatibility

Designed as a standard hand plug tap for any application requiring 4-40 UNC internal threads in machinable materials.

Installation Notes

Use with a properly sized tap wrench and apply cutting fluid to extend tool life and produce cleaner threads when tapping steel or aluminum. Pre-drill with the correct 4-40 tap drill size before tapping. Reverse the tap periodically during cutting to break chips and reduce the risk of binding or breakage. This tool is intended for hand operation — do not use in a power drill or impact driver without a dedicated tapping attachment.

Technical Specifications

• Thread Size: 4-40 UNC
• Tap Style: Hand Plug
• Material: High-Speed Steel (HSS)
• Country of Origin: USA
• Weight: 0.04 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-440-P-D