Cleveland C54924 Hand Tap 1-8 Unc Plug 4-flute Hss

Product Description

The CLEVELAND C54924 is a 1-8 UNC straight-flute hand tap designed for threading operations in both blind holes and through holes. Manufactured from high speed steel with a bright uncoated finish, this plug-chamfer tap features four flutes and a right-hand thread direction. It carries a Class 3B fit with an H4 thread limit, making it suitable for close-tolerance tapped holes where dimensional accuracy matters. Overall length is 5.125 inches with a thread length of 2.5 inches. It is used by machinists and tool-and-die professionals working in job shops, maintenance facilities, and production environments.

The C54924 is suited for both blind hole and through-hole threading applications across a range of workpiece materials. The plug chamfer — typically 3 to 5 threads of taper — works well as a general-purpose starting tap in most threading sequences. It is commonly used in manual tapping operations with a tap wrench or tapping fixture. No coolant-through capability is present, so flood or brush-applied cutting fluid is the standard approach when tapping harder materials in this size range.

Key Features

• 1-8 UNC thread form, right-hand, Class 3B fit with H4 thread limit for close-tolerance work
• Plug chamfer (standard lead) supports both blind hole and through-hole threading
• 4-flute straight-flute geometry provides good chip control in a variety of workpiece materials
• High speed steel construction offers toughness and wear resistance across general machining applications
• Bright uncoated finish — no coating buildup at cutting edges, suitable for use with cutting fluid
• Shank diameter of 0.8 inches fits standard tap wrenches and tapping heads for this size range

Compatibility

Designed for use in alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces. Part of the CLEVELAND Series 1002 tap line.

Installation Notes

Hand taps in this size range are installed by licensed machinists or skilled maintenance technicians using a tap wrench or manual tapping fixture. Secure the workpiece firmly and ensure the tap is started square to the hole to prevent thread misalignment or tap breakage. Apply an appropriate cutting fluid for the workpiece material before and during tapping. For blind holes, clear chips frequently by backing the tap out to avoid chip packing and potential tap breakage.