Eagle Cutting Tool HT-448-T-D 4-48 Hss Hand Taper Tap

Product Description

The EAGLE CUTTING TOOL HT-448-T-D is a 4-48 high-speed steel hand taper tap manufactured in the USA. It is designed to cut internal threads in metal workpieces by hand, producing a 4-48 UNF (Unified Fine) thread form. The taper lead — typically 8 to 10 threads of gradual thread engagement — eases entry into a pre-drilled hole and helps align the tap squarely before full thread cutting begins. At 0.04 pounds, this is a compact, lightweight tap suited for precision threading work in small fastener applications. Machinists, maintenance technicians, and skilled tradespeople use this tap for production threading and repair work on equipment, fixtures, and assemblies.

The HT-448-T-D is used wherever a 4-48 UNF internal thread is required, including small mechanical assemblies, instrument panels, electrical enclosures, and precision equipment. The taper style is the standard starting tap for initiating threads in through-holes or for beginning a threading sequence in blind holes before following with a plug or bottoming tap. Typical applications include light manufacturing, HVAC control component repair, and general maintenance environments where fine-thread fasteners in small diameters are common.

Key Features

• 4-48 UNF thread form for fine-pitch threading in small-diameter holes
• High-speed steel (HSS) construction for durability across a range of metals including mild steel, aluminum, and brass
• Taper lead design eases starting alignment and reduces tap breakage risk
• USA manufactured for consistent dimensional accuracy and heat treatment quality
• Lightweight at 0.04 pounds — easy to handle in precision hand-tapping operations

Compatibility

Designed as a standard hand taper tap for any application requiring a 4-48 UNF internal thread, compatible with standard 4-48 tap handles and T-handle wrenches.

Installation Notes

This tap is intended for hand operation using a properly sized tap wrench or T-handle. Secure the workpiece firmly before tapping and ensure the pilot hole is drilled to the correct 4-48 tap drill size. Apply cutting fluid or tapping oil to lubricate the tap and clear chips, especially in ferrous metals. Reverse the tap periodically to break chips and prevent binding that can lead to tap breakage.

Technical Specifications

• Thread Size: 4-48 UNF
• Tap Type: Hand Taper
• Material: High-Speed Steel (HSS)
• Country of Origin: USA
• Weight: 0.04 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-448-T-D