Cleveland C54331 Hand Tap 10-24 Unc Bottoming Hss

Product Description

The CLEVELAND C54331 is a 10-24 UNC straight-flute hand tap designed for cutting internal threads in both blind and through-hole applications. Manufactured from high speed steel with a bright, uncoated finish, it features a bottoming chamfer that allows threading to the bottom of blind holes with minimal clearance. The 4-flute straight-flute geometry provides stable chip control and is appropriate for use in a range of common workpiece materials. Overall length is 2.375 inches with a thread length of 0.5 inches. Thread direction is right hand. This tap is suited for machinists, toolmakers, and maintenance technicians working in production or repair environments.

The C54331 is built for blind hole and through-hole threading operations where a bottoming chamfer is required to achieve full thread engagement close to the hole floor. The H3 thread limit and 2B/3B class of fit make it a practical choice for standard fastener threads in alloy steel, carbon steel, aluminum, and free-machining stainless steel workpieces. It is sold individually and suited for both manual tapping and low-speed machine tapping setups in general machining and MRO applications.

Key Features

• Bottoming chamfer enables full thread depth in blind holes
• 4-flute straight-flute design for controlled chip formation
• High speed steel construction for durability across common workpiece materials
• Bright, uncoated finish with no coolant-through requirement
• H3 thread limit with 2B/3B class of fit for standard UNC thread tolerances
• Right-hand thread direction, 10-24 UNC

Compatibility

Designed for threading 10-24 UNC blind and through-holes in alloy steel, carbon steel, aluminum, and free-machining stainless steel. Compatible with standard tap holders and wrench drives accepting a 0.194-inch shank diameter and a 0.152-inch square drive.

Installation Notes

Hand taps should be installed and driven using a properly sized tap wrench or T-handle to maintain axial alignment. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill diameter per UNC standards before tapping. Apply appropriate cutting fluid for the workpiece material to extend tap life and reduce galling. For blind holes, clear chips periodically by reversing the tap to prevent jamming and tap breakage.