Cleveland C54190 Hand Tap 5-40 Unc Bottoming Hss

Product Description

The CLEVELAND C54190 is a 5-40 UNC straight-flute hand tap designed for cutting internal threads in both blind holes and through-holes. Built from high speed steel with a bright uncoated finish, this bottoming tap features a minimal chamfer that allows threading to the bottom of a blind hole. The 3-flute straight-flute geometry evacuates chips effectively in a range of common metallic materials. With an overall length of 1.938 inches and a thread length of 0.31 inches, this tap fits standard tap wrenches used by machinists and maintenance technicians in production and repair environments.

This tap is suited for hand tapping operations in job shops, maintenance facilities, and manufacturing environments where fine-pitch 5-40 threads are required. It is appropriate for use in alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces. The right-hand thread direction and H2 thread limit make it a standard choice for achieving 2B and 3B class-of-fit tolerances in these materials.

Key Features

• Bottoming chamfer allows threading to the base of blind holes
• High speed steel construction provides durability across common metallic workpiece materials
• Bright uncoated finish suitable for use with standard cutting fluids
• H2 thread limit produces 2B and 3B class-of-fit threads
• 3-flute straight-flute design for chip clearance in hand tapping
• No coolant-through requirement — compatible with standard hand tapping practice

Compatibility

Designed for blind hole and through-hole threading in alloy steel, aluminum, carbon steel, and free-machining stainless steel. Fits standard tap wrenches accommodating a 0.141-inch shank diameter.

Installation Notes

Hand taps should be installed by a qualified machinist or maintenance technician using an appropriate tap wrench sized to the square drive. Always apply a suitable cutting fluid for the workpiece material before starting the tap, and back off the tap periodically to break and clear chips. Ensure the workpiece is secured before threading to prevent movement that can cause tap breakage. Inspect the tap for wear or damage before each use.