Cleveland C55234 Hand Tap 1/2-20 Bottoming Tin Hss Unf

Product Description

The CLEVELAND C55234 is a straight-flute hand tap designed for cutting 1/2-20 UNF internal threads in blind holes and through-holes. Built from high speed steel with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction during threading operations. The bottoming chamfer allows threads to be cut close to the bottom of a blind hole, making it the right choice when thread engagement depth is critical. With 4 flutes and a right-hand thread direction, this tap is suited for use in a tap wrench or fixture by machinists, maintenance technicians, and tool-and-die professionals.

This tap is rated for Class 3B fit to a H3 thread limit, meaning it produces close-tolerance threads appropriate for precision assemblies. It is intended for threading operations in alloy steel, carbon steel, aluminum, and free-machining stainless steel. At 3-3/8 inches overall length with a 1-21/32 inch thread length, it fits standard hand tapping setups. The Series 1003TN designation indicates it belongs to a TiN-coated HSS tap line designed for production and maintenance environments where thread quality and tool longevity matter.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• TiN coating reduces friction and extends tool life compared to uncoated HSS
• 4-flute straight-flute geometry for chip management in common workpiece materials
• Class 3B fit, H3 thread limit for close-tolerance UNF thread production
• Compatible with alloy steel, carbon steel, aluminum, and free-machining stainless steel
• Right-hand thread direction for standard tapping operations

Compatibility

Designed for blind hole and through-hole threading applications requiring a 1/2-20 UNF right-hand thread. Suitable for use with standard hand tap wrenches and tapping fixtures that accept a 0.367-inch shank diameter.

Installation Notes

Hand taps should be installed by machinists or maintenance technicians familiar with tapping procedures and proper cutting fluid selection for the workpiece material. Always secure the workpiece firmly and ensure the tap is started square to the hole to prevent tap breakage. Use an appropriate cutting fluid or tapping compound for the material being threaded. Back the tap out periodically to break chips when tapping blind holes.