Hertel K008668AS Straight Flute Tap 1-1/4-12 Unf 6 Flute

Product Description

The HERTEL K008668AS is a straight flute bottoming tap designed for threading 1-1/4-12 UNF internal threads in machined workpieces. Built from high speed steel with a bright uncoated finish, it delivers reliable thread formation in a range of common shop materials. The bottoming chamfer allows threading close to the bottom of blind holes, making it well suited for tight-tolerance fastener applications. With 6 flutes and an H4 thread limit, this tap holds Class 3B fit requirements for precision threaded assemblies. Overall length is 5.75 inches and the tool weighs 1.2 pounds.

This tap is used in machining and metalworking environments where fine-pitch UNF threads are required in blind or through holes. It is appropriate for production shops, maintenance facilities, and tool rooms working with steel, aluminum, and similar materials. Right-hand thread direction matches standard fastener orientation for most industrial and mechanical assemblies.

Key Features

• Bottoming chamfer for threading to the bottom of blind holes
• 6 straight flutes for efficient chip handling in short-chipping materials
• High speed steel construction for durability across general-purpose threading operations
• H4 thread limit for consistent Class 3B fit tolerance
• Bright uncoated finish suitable for use with cutting fluids
• Right-hand thread direction for standard fastener applications

Compatibility

Designed as an OEM-style straight flute bottoming tap for 1-1/4-12 UNF threaded hole applications in standard machining and maintenance environments.

Installation Notes

This tap is installed by machinists and tool room technicians using a tap handle, tapping head, or CNC spindle with appropriate torque control. Secure the workpiece and ensure the tap is properly aligned before engagement to prevent thread damage or tool breakage. Use a suitable cutting fluid to extend tool life and improve thread finish. Do not reverse the tap without breaking chips first when working in blind holes.