Hertel K008070AS Spiral Point Tap 3-56 Unf 2 Flute Hss

Product Description

The HERTEL K008070AS is a spiral point tap designed for cutting internal threads in metal workpieces. It produces 3-56 UNF threads and is built from high-speed steel with a bright, uncoated finish. The plug chamfer style makes it well suited for through-hole tapping applications where the tap can push chips forward and clear them from the cutting zone. The 2-flute configuration keeps the body narrow for use in tight clearance situations. Thread limit is H2, which controls the tolerance of the tapped thread and is appropriate for standard 2B class of fit requirements. Right-hand thread direction is standard for most fastener applications in this size range.

This tap is used in machine shop and maintenance environments for threading small-diameter holes in steel, aluminum, brass, and similar machinable materials. The 3-56 UNF thread form is common in precision instrument work, electronics enclosures, and small mechanical assemblies where fine-pitch threads provide greater holding strength than coarse-pitch alternatives. It is typically installed in a tapping head, drill press, CNC machine, or hand tap wrench depending on the application and production volume.

Key Features

• 3-56 UNF thread form for fine-pitch small-diameter threading
• Spiral point geometry pushes chips forward, keeping flutes clear during through-hole tapping
• High-speed steel construction provides toughness and wear resistance in general-purpose tapping
• Plug chamfer allows easy starting and continuous cutting in through holes
• H2 thread limit maintains tight tolerance control for 2B class of fit
• Bright, uncoated finish suitable for use with standard cutting fluids

Compatibility

Designed as an OEM-style replacement or direct-use spiral point tap for any application requiring a 3-56 UNF, 2B class of fit, right-hand thread in through-hole configurations.

Installation Notes

This tap is installed by machinists and tooling technicians using a tap wrench, tapping head, or CNC rigid tapping cycle. Always use an appropriate cutting fluid or tapping compound to extend tool life and produce a cleaner thread finish. Secure the workpiece firmly before tapping to prevent movement that can break the tap. Do not reverse the tap direction until chips have been cleared to avoid tap breakage in small-diameter applications.