Cleveland C54156 Tap Set 4-48 Unf 3 Flute Hss

Product Description

The CLEVELAND C54156 is a 3-piece tap set designed for cutting 4-48 UNF internal threads in metalworking applications. The set includes all three chamfer styles — bottoming, plug, and taper — allowing machinists and maintenance technicians to start, continue, and finish threaded holes in a single setup. Taps are manufactured from high speed steel with a bright finish and feature 3 flutes for efficient chip evacuation. Overall length is 1.875 inches with a thread length of 0.31 inches. The H2 thread limit designation indicates a tolerance class suited for standard fit threaded fastener applications.

This tap set is used in precision machining, tool-and-die, maintenance and repair, and light manufacturing environments where 4-48 UNF fine-thread holes are required. The fine thread pitch of the UNF standard makes this set well suited for thin-material applications, small fastener assemblies, and situations where vibration resistance or precise torque sensitivity is needed. It is a single-package set (Series 1004) appropriate for bench work, drill press setups, and hand-tapping operations.

Key Features

• Three-piece set includes bottoming, plug, and taper chamfer taps for complete thread cutting from start to finish
• 4-48 UNF thread form for fine-pitch internal threading in small fastener applications
• High speed steel construction provides durability across a range of ferrous and non-ferrous materials
• 3-flute geometry promotes chip clearance and smooth cutting action
• H2 thread limit for standard tolerance fits
• Bright finish — no coating to alter tap geometry or thread form

Compatibility

Designed for cutting 4-48 UNF right-hand threads in standard metalworking and maintenance applications. Confirm workpiece material hardness is within the rated range for high speed steel tooling before use.

Installation Notes

Tapping operations should be performed by a qualified machinist or maintenance technician familiar with thread-cutting procedures. Always use appropriate tapping fluid or cutting oil to extend tap life and improve thread quality. Secure the workpiece firmly before beginning, and advance the tap slowly with periodic back-off to break and clear chips — particularly when using the bottoming tap in blind holes. Inspect tap condition before each use; a damaged or worn tap should not be used as it can produce out-of-tolerance threads or break in the workpiece.