Hertel K010300AS Thread Forming Tap 0-80 Unf 3B Bottoming

Product Description

The HERTEL K010300AS is a thread forming tap designed for creating internal 0-80 UNF threads in blind holes without cutting. Unlike cutting taps, thread forming taps displace material rather than remove it, producing stronger threads with no chips to clear. Made from high-speed steel with a bright/uncoated finish, this tap features a bottoming chamfer of 1 to 2 threads, making it suited for threading close to the bottom of a blind hole. Overall length is 1.625 inches with a thread length of 0.3125 inches and a shank diameter of 0.141 inches. The H2 thread limit ensures consistent fit tolerance for 3B class of fit applications.

This tap is intended for use in blind hole threading operations where a 0-80 UNF thread form is required. The 0-80 thread size is common in precision instrument work, electronics, and miniature mechanical assemblies. The bottoming chamfer allows threading to within 1 to 2 pitches of the hole bottom, which is critical when thread engagement depth is limited. Right-hand thread direction is standard. Typical users include machinists, tool and die makers, and maintenance technicians working with fine-pitch miniature fasteners in ferrous and non-ferrous materials suited to thread forming.

Key Features

• Thread forming design displaces material for chip-free blind hole threading
• 0-80 UNF thread size with 3B class of fit and H2 thread limit
• Bottoming chamfer (1 to 2 threads) for threading close to hole bottom
• High-speed steel construction for durability in production and maintenance use
• Bright/uncoated finish suitable for general-purpose applications
• Right-hand thread direction, no coolant-through feature

Compatibility

Designed as a direct-fit thread forming tap for blind hole applications requiring a 0-80 UNF internal thread with a 3B class of fit in materials compatible with cold-form tapping.

Installation Notes

Thread forming taps require a specific tap drill size matched to the thread form - consult a thread forming drill chart for the correct hole diameter before use, as it differs from cutting tap recommendations. Secure the workpiece and use a properly sized tap wrench or CNC tapping chuck to maintain alignment. Apply appropriate tapping fluid for the workpiece material to reduce tap wear and improve thread quality. Power down any machine spindle and follow standard lockout/tagout procedures before changing tooling.