Cleveland C55138 Hand Tap 9/16-18 Unf Plug Tin Hss

Product Description

The CLEVELAND C55138 is a 9/16-18 UNF straight-flute hand tap designed for right-hand threading in both blind and through-hole applications. Built from high speed steel with a titanium nitride (TiN) coating, this plug-chamfer tap delivers extended tool life in demanding machining environments. The H3 thread limit provides the close tolerancing needed for Class 2B fits. With four flutes and a plug chamfer, it cuts threads progressively and is suited for general-purpose tapping by machinists, tool-and-die makers, and maintenance technicians working with threaded fastener holes across a range of metals.

The C55138 is designed for tapping 9/16-18 UNF right-hand threads in both blind and through-hole configurations. It performs across a broad range of materials including alloy steel, carbon steel, aluminum, and free-machining stainless steel. The Series 1002TN designation identifies it within Cleveland's TiN-coated HSS tap line, making it a standard shop tap for production and maintenance work where thread quality and tool longevity are priorities.

Key Features

• TiN coating extends wear resistance and reduces friction in steel and aluminum applications
• Plug chamfer (3-5 thread lead) suits both blind and through-hole threading
• H3 thread limit for Class 2B fit tolerancing
• 4-flute straight-flute geometry for clean thread formation in short-chipping materials
• High speed steel construction for durability across general metalworking applications
• Right-hand thread direction, 18 threads per inch, UNF standard

Compatibility

Designed for use in any standard 9/16-18 UNF tapping application requiring a plug-chamfer, straight-flute hand tap in alloy steel, carbon steel, aluminum, or free-machining stainless steel.

Installation Notes

This tap is intended for use by machinists and maintenance technicians using a tap wrench or appropriate machine holder. Always ensure the workpiece is securely clamped and the tap is started square to the hole to avoid thread misalignment or tap breakage. Use appropriate cutting fluid for the workpiece material. For blind holes, clear chips regularly to prevent packing and tap damage.