Hertel K008456AS 3/8-24 Unf Plug Hand Tap 4-flute Hss

Product Description

The HERTEL K008456AS is a 3/8-24 UNF straight-flute hand tap designed for cutting right-hand internal threads in a range of materials. Built from high speed steel with a bright, uncoated finish, this tap is suited for general-purpose threading operations where coolant-through capability is not required. The plug chamfer style provides a gradual thread entry with approximately 3 to 5 chamfered lead threads, making it a practical choice for through-hole applications. With an overall length of 2-15/16 inches and a thread length of 1-1/4 inches, the K008456AS is a compact, reliable option for machinists, tool-and-die workers, and maintenance technicians.

This tap is intended for hand-tapping operations on 3/8-24 UNF thread forms in through-hole configurations. The H2 thread limit designation indicates a tighter tolerance range appropriate for standard UNF fits. It is commonly used in machine shops, maintenance and repair environments, and production settings where manual thread cutting in steel, aluminum, and similar materials is required. The 4-flute straight-flute geometry provides good chip control in shorter-chipping materials.

Key Features

• 3/8-24 UNF thread size with right-hand thread direction
• Plug chamfer for gradual thread entry, ideal for through-hole tapping
• High speed steel construction for durability across a range of workpiece materials
• H2 thread limit for consistent, close-tolerance UNF thread fits
• 4-flute straight-flute design promotes chip control in shorter-chipping materials
• Bright, uncoated finish for general-purpose use without coating-related size buildup

Compatibility

Designed as a standard hand tap for 3/8-24 UNF through-hole threading applications compatible with conventional tap wrenches and T-handle drivers accepting a 0.286-inch square drive shank.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician following standard hand-tapping procedures. Secure the workpiece firmly before tapping and ensure the tap is started perpendicular to the workpiece surface to avoid cross-threading or tap breakage. Apply an appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Back the tap off periodically to break chips and clear the flutes during operation.