Hertel K008049AS Straight Flute Tap 2-64 Unf Hss

Product Description

The HERTEL K008049AS is a straight flute plug tap designed for cutting internal threads in through-holes and blind holes where chip evacuation is managed manually or with coolant flush. Built from high-speed steel with a bright uncoated finish, it cuts a 2-64 UNF right-hand thread to a 2B class of fit. The H2 thread limit ensures consistent dimensional tolerance across production runs. With a 7/16 inch thread length and an overall length of 1-3/4 inches, this tap is sized for small-fastener applications in light metals, plastics, and similar materials. It is a standard three-flute configuration with a plug chamfer, making it suitable for starting threads in a pre-drilled hole.

This tap is used in machining, fabrication, and assembly operations where 2-64 UNF threads are required. The plug chamfer provides a gradual thread start, which suits both hand tapping and machine tapping in drill press or CNC applications. Typical use cases include threading small clearance holes in instrument housings, electronics enclosures, optical mounts, and precision mechanical assemblies. Machinists, tool-and-die technicians, and precision fabricators are the primary users of this size range.

Key Features

• 2-64 UNF thread form, right-hand, 2B class of fit for standard tolerance internal threads
• H2 thread limit for consistent fit across repeated use
• Three straight flutes with plug chamfer for gradual thread engagement
• High-speed steel construction for durability across a range of workpiece materials
• Bright uncoated finish — no coating buildup to affect tolerance in fine thread sizes
• Compact 1-3/4 inch overall length suits confined workpiece geometries

Compatibility

Designed as a standard OEM-style replacement or production tap for any application requiring a 2-64 UNF straight flute plug tap with a 2B class of fit and H2 thread limit.

Installation Notes

This tap is installed by machinists or precision fabricators using a tap wrench, tapping head, or CNC rigid tapping cycle. Always use the correct tap drill size for a 2-64 UNF thread before tapping, and apply appropriate cutting fluid for the workpiece material. Secure the workpiece firmly and align the tap perpendicular to the hole to avoid tap breakage, which is a significant risk at this small diameter. Back the tap out periodically to break and clear chips when hand tapping.