Cleveland C55144 Hand Tap 3/4-10 Unc Tin Hss 4-flute

Product Description

The CLEVELAND C55144 is a 3/4-10 UNC straight flute hand tap designed for cutting internal threads in both blind and through-hole applications. Built from high speed steel with a titanium nitride (TiN) coating, it delivers extended tool life and improved wear resistance compared to uncoated taps. The plug chamfer provides a moderate lead-in, making it well suited for through-hole threading and blind holes with adequate depth. With 4 flutes, an H3 thread limit, and a Class 2B fit, this tap meets standard tolerance requirements for general-purpose threaded fastener installations across a range of materials.

This tap is intended for use by machinists, toolmakers, and maintenance technicians working in production or job-shop environments. It is sized for 3/4-10 UNC threads and performs in alloy steel, carbon steel, aluminum, and free-machining stainless steel. The TiN coating helps reduce built-up edge and friction in these materials, supporting longer run life in both manual and machine-assisted hand tapping operations. It belongs to the Cleveland 1002TN series, which covers general-purpose TiN-coated hand taps.

Key Features

• TiN coating improves wear resistance and reduces friction during tapping
• Plug chamfer provides moderate lead-in, suitable for blind and through-hole threading
• H3 thread limit with Class 2B fit for standard general-purpose thread tolerance
• 4-flute straight flute design for use in a wide range of workpiece materials
• Right-hand thread direction, 3/4-10 UNC
• High speed steel construction for durability in intermittent and production tapping

Compatibility

Designed for cutting 3/4-10 UNC internal threads in alloy steel, carbon steel, aluminum, and free-machining stainless steel in blind hole and through-hole configurations. Part of the Cleveland 1002TN series.

Installation Notes

This tap is installed by machinists or maintenance technicians using a standard tap wrench or tapping fixture. Always drill the correct tap drill diameter before tapping and ensure the workpiece is securely fixtured. Apply cutting fluid appropriate for the workpiece material to reduce heat and extend tool life. For blind holes, monitor depth carefully to avoid bottoming the tap and damaging the flutes or the part.