Cleveland C54089 Hand Tap 2-56 Taper Hss 3-flute

Product Description

The CLEVELAND C54089 is a 2-56 taper hand tap designed for creating internal threads in both blind holes and through-holes. Built from high speed steel (HSS) with a bright, uncoated finish, this right-hand tap runs a 3-flute straight flute geometry suited for controlled chip handling. It carries a Class 2B fit with an H2 thread limit, holding tight tolerances appropriate for #2-56 UNC threads. Overall length is 1.75 inches (44.45 mm), with a thread length of 0.44 inches. The taper chamfer eases thread entry and is the standard choice for starting a new threaded hole from scratch. Machinists and toolroom technicians install this tap by hand or in a tap wrench as part of Series 1001.

This tap is intended for threading #2-56 UNC holes across a range of workpiece materials, including alloy steel, aluminum, carbon steel, and free-machining stainless steel. Its straight flute design makes it suitable for both blind hole and through-hole threading applications where chips can be backed out periodically during the tapping cycle. The taper chamfer — typically 7 to 10 threads of lead — helps align the tap squarely at entry, reducing cross-threading risk in small-diameter work. It is commonly used in precision machining, instrument manufacturing, and small-fastener assembly operations.

Key Features

• High speed steel construction for durability across a wide range of ferrous and non-ferrous materials
• Bright, uncoated finish — no coating buildup that could affect tight tolerances in small-diameter threads
• Taper chamfer for guided thread entry, standard for starting new holes
• 3-flute straight flute geometry for controlled chip evacuation in blind and through-hole applications
• Class 2B fit with H2 thread limit for standard-tolerance UNC threaded assemblies
• Compact 1.75-inch overall length with 0.141-inch shank diameter suited for small-format work

Compatibility

Designed for cutting #2-56 UNC internal threads in alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces in both blind hole and through-hole configurations. Part of the Cleveland Series 1001 tap line.

Installation Notes

This tap is installed by machinists or toolroom technicians using a tap wrench or tapping fixture. Always drill the correct tap drill size before tapping and ensure the workpiece is secured before starting. Apply appropriate cutting fluid for the workpiece material to extend tap life and improve thread finish. Back the tap out periodically to break and clear chips, particularly in blind hole applications.