Cleveland C55112 Hand Tap 12-24 Unc Plug Tin Hss

Product Description

The CLEVELAND C55112 is a 12-24 UNC straight-flute hand tap designed for cutting internal threads in both blind holes and through-holes. Manufactured from high speed steel with a TiN (titanium nitride) coating, it delivers extended tool life and reduced friction during tapping operations. The plug chamfer style provides a balance between starting ease and thread engagement depth, making it well suited to general-purpose threading work. With 4 flutes and a right-hand thread direction, it produces clean, accurate threads to a 2B and 3B class of fit at an H3 thread limit. Overall length is 2.375 inches with a thread length of 0.500 inches. Machinists, tool and die makers, and maintenance technicians use this tap for production and repair threading tasks.

The C55112 is intended for threading operations in alloy steel, carbon steel, aluminum, and free-machining stainless steel. It fits standard tap wrenches and tapping fixtures that accept a 0.220-inch shank diameter. The square drive measures 0.165 inches, compatible with common tap holders in machine shop and field maintenance environments. This tap is appropriate for both manual hand-tapping and guided machine-assist setups where a straight-flute design is specified.

Key Features

• TiN coating reduces friction and extends cutting life compared to uncoated HSS taps
• Plug chamfer style suits both blind hole and through-hole threading
• 4 straight flutes provide chip clearance and cutting stability
• Right-hand thread, 2B and 3B class of fit at H3 thread limit for standard tolerance threading
• Compatible with alloy steel, carbon steel, aluminum, and free-machining stainless steel workpieces
• No coolant-through requirement simplifies setup in manual and light machine applications

Compatibility

Designed for use in 12-24 UNC tapping applications in alloy steel, aluminum, carbon steel, and free-machining stainless steel. Part of the CLEVELAND Series 1002TN family of TiN-coated hand taps.

Installation Notes

Installation is performed by machinists or maintenance technicians using a standard tap wrench or tapping fixture. Ensure the workpiece is securely clamped and the tap is started perpendicular to the drilled hole to prevent thread misalignment or tap breakage. Use a cutting fluid appropriate for the workpiece material to improve surface finish and extend tap life. Back the tap off periodically to break chips, especially in blind hole applications.