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

Product Description

The EAGLE CUTTING TOOL HT-440-B-D is a 4-40 high-speed steel (HSS) hand tap manufactured in the USA. Hand taps are used to cut internal threads into pre-drilled holes, and the 4-40 size designates a No. 4 screw size with 40 threads per inch (UNC). This tap is a manually driven threading tool suited for use in machine shops, maintenance facilities, and trade applications where precise small-diameter internal threading is required. At 0.04 pounds, it is a compact, lightweight tool built for controlled hand or tap wrench operation.

The HT-440-B-D is appropriate for threading small-diameter holes in metal, plastic, and similar materials where a 4-40 UNC thread form is specified. Typical applications include electrical enclosure hardware, small mechanical assemblies, and instrument panel fastener locations. It is used by machinists, electricians, HVAC technicians, and maintenance professionals who need to create or restore 4-40 threads in the field or shop.

Key Features

• 4-40 UNC thread form for small-diameter internal threading applications
• High-speed steel (HSS) construction for durability and heat resistance during cutting
• USA manufactured for consistent dimensional accuracy and thread quality
• Lightweight at 0.04 pounds, suited for hand or tap wrench use
• Minimum order quantity of 1, available as a single unit

Compatibility

Designed as a standard 4-40 UNC hand tap compatible with any tap wrench or handle sized for No. 4 taps, for use in applications requiring 4-40 internal threads.

Installation Notes

A licensed machinist or qualified technician should select the correct tap drill size for a 4-40 thread before use. Secure the workpiece and use a properly sized tap wrench to maintain alignment and prevent tap breakage. Apply appropriate cutting fluid when threading metal to extend tap life and improve thread quality. Back the tap off periodically to break chips and clear the flutes during the threading operation.

Technical Specifications

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

Standard Information

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