Eagle Cutting Tool HT-164-B-I 1-64 Hss Bottom Tap

Product Description

The EAGLE CUTTING TOOL HT-164-B-I is a 1-64 high-speed steel (HSS) hand bottom tap designed for threading operations that require cutting threads to the bottom of a blind hole. The bottom tap geometry features minimal thread lead, allowing the tap to cut close to the bottom of a hole where a taper or plug tap cannot reach. At 0.31 pounds, this is a compact, hand-drive tool suited for machinists, toolmakers, maintenance technicians, and production workers who need clean, accurate internal threads in small-diameter work.

This tap is used in applications requiring 1-64 Unified National Fine (UNF) threads, one of the smallest standard thread sizes in common use. It is appropriate for threading small clearance holes in metal components including aluminum, mild steel, and similar machinable materials. Typical applications include instrument assembly, electronics enclosures, fixture fabrication, and precision mechanical assemblies where fine threads in tight spaces are required.

Key Features

• Bottom tap geometry for threading to the bottom of blind holes
• 1-64 thread form for fine-pitch, small-diameter internal threads
• High-speed steel (HSS) construction for durability across a range of machinable metals
• Hand-drive design compatible with standard tap wrenches
• Lightweight at 0.31 pounds for easy handling in close-tolerance work

Compatibility

Designed as a hand-drive bottom tap for use in applications requiring 1-64 internal threads, compatible with standard tap wrenches sized for small-diameter taps.

Installation Notes

This tap is installed by hand using a tap wrench; power driving is not recommended for taps in this size range due to the high risk of breakage. Ensure the pilot hole is drilled to the correct tap drill size for 1-64 threads before starting. Apply cutting fluid appropriate for the workpiece material to reduce friction and extend tap life. Back the tap off periodically to break chips when threading blind holes.

Technical Specifications

• Thread Size: 1-64
• Tap Type: Hand Bottom Tap
• Material: High-Speed Steel (HSS)
• Weight: 0.31 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-164-B-I