Hertel K008467AS25 Spiral Point Tap 3/8-24 Unf Tin Hss

Product Description

The HERTEL K008467AS25 is a spiral point tap designed for cutting 3/8-24 UNF internal threads in through-hole applications. The spiral point geometry pushes chips forward ahead of the cutting action, reducing packing and breakage in production environments. Manufactured from high-speed steel with a titanium nitride (TiN) coating, this tap delivers extended tool life and reduced friction compared to uncoated HSS alternatives. It features a plug chamfer, three flutes, an H3 thread limit, a 3B class of fit for standard tolerance internal threads, and right-hand thread direction. Machinists, tool-and-die professionals, and maintenance technicians use this tap in drilling and tapping operations on steel, aluminum, and similar machinable materials.

This tap is suited for through-hole tapping in a range of ferrous and non-ferrous workpieces where 3/8-24 UNF thread specification is required. The plug chamfer distributes the cutting load across several leading threads, making it appropriate for general-purpose tapping in production and repair settings. The H3 thread limit ensures compatibility with standard 3B class fit fasteners and hardware. Manual tapping, drill press, and CNC tapping operations are all within scope for this tool.

Key Features

• Spiral point geometry advances chips forward, ideal for through-hole tapping
• 3/8-24 UNF thread size with H3 thread limit and 3B class of fit
• High-speed steel construction provides toughness and regrindability
• TiN coating reduces friction and extends cutting life versus bare HSS
• Plug chamfer with 3 flutes for general-purpose production tapping
• Right-hand thread direction, no coolant-through feature

Compatibility

Designed as a standard replacement or direct-use spiral point tap for 3/8-24 UNF through-hole tapping operations; no specific machine or system compatibility data was provided in the product record.

Installation Notes

Install this tap in a proper tap holder, chuck, or tapping head that matches the tap shank size and provides axial float to prevent thread distortion. Always drill the correct tap drill diameter for 3/8-24 UNF before tapping and confirm workpiece is securely fixtured. Apply appropriate cutting fluid for the workpiece material to preserve coating life and surface finish. Do not exceed the torque capacity of the tap for the material being cut, particularly in harder steels.