Cleveland C54277 Hand Tap 8-32 Unc Taper 4-flute Hss

Product Description

The CLEVELAND C54277 is a straight-flute hand tap designed for cutting 8-32 UNC internal threads in metalworking applications. Built from high speed steel with a bright uncoated finish, this tap features a taper chamfer that guides the tool gradually into the workpiece for controlled thread engagement. It carries a Class 2B fit with an H3 thread limit, delivering threads within standard tolerance for most general-purpose fastener assemblies. Overall length is 2.125 inches with a thread length of 0.38 inches (19.05 mm). Licensed machinists, tool-and-die technicians, and maintenance mechanics use this tap for hand-tapping operations in production and repair environments.

The C54277 is suited for both blind hole and through-hole threading operations. The taper chamfer distributes cutting load across several leading threads, making it the preferred starting tap when no thread exists in the hole. It is compatible with a range of workpiece materials including alloy steel, carbon steel, aluminum, and free-machining stainless steel. The 4-flute straight-flute geometry provides good chip clearance in shorter threading passes typical of 8-32 fastener work on light structural and mechanical assemblies.

Key Features

• 8-32 UNC thread form, Class 2B fit, H3 thread limit for standard tolerance assemblies
• Taper chamfer distributes cutting load for smooth thread entry in blind and through holes
• High speed steel construction provides wear resistance across common ferrous and non-ferrous materials
• Bright uncoated finish suitable for use with cutting fluids or dry in aluminum and free-machining steels
• 4-flute straight-flute design offers stable cutting action on short-length threading passes
• Right-hand thread direction, standard for the vast majority of fastener applications

Compatibility

Designed for blind hole and through-hole threading in alloy steel, carbon steel, aluminum, and free-machining stainless steel workpieces requiring 8-32 UNC internal threads at Class 2B fit.

Installation Notes

This tap is intended for use by machinists and maintenance technicians operating manual tap wrenches or low-speed tapping fixtures. Always secure the workpiece firmly and ensure the pilot hole diameter is correct for 8-32 UNC threading before starting. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. Do not force the tap if resistance increases unexpectedly — back off to break chips and clear the flutes before continuing.