Cleveland C56004 Hand Tap 10-24 Unc Plug 4-flute Hss

Product Description

The CLEVELAND C56004 is a 10-24 UNC plug-chamfer hand tap designed for cutting internal threads in both blind and through-hole applications. Made from high speed steel (HSS) with an oxide coating, this 4-flute straight-flute tap provides consistent chip clearance and durability across a range of ferrous materials. It carries a Class 2B thread fit with an H3 thread limit, making it appropriate for standard tolerance threaded assemblies. The overall length is 2.375 inches, and the threaded portion spans 0.5 inches. Machinists, toolmakers, and maintenance technicians use this tap in manual tapping operations with a tap wrench or tapping fixture.

This tap is suited for production and maintenance threading tasks in metalworking shops, fabrication facilities, and industrial maintenance environments. The plug chamfer — with a taper that bridges starter and bottoming taps — makes it versatile for starting threads in through-holes and for tapping holes with adequate depth clearance. Rated for use in cast iron, stainless steel, and steel. The right-hand thread direction matches the standard 10-24 UNC fastener specification, so no special tooling configuration is required for most setups.

Key Features

• 10-24 UNC thread form, Class 2B fit, H3 thread limit for standard tolerance internal threads
• High speed steel construction for wear resistance in cast iron, stainless steel, and carbon steel
• Oxide coating reduces friction and provides light corrosion protection during storage and use
• 4-flute straight-flute geometry promotes chip evacuation in both blind and through-hole threading
• Plug chamfer allows use as a general-purpose starting tap without requiring a separate taper tap
• Right-hand cut, non-coolant-through design compatible with standard manual and light-machine tapping

Compatibility

Designed as a standard 10-24 UNC replacement or production tap compatible with manual tap wrenches and tapping heads sized for the 0.194-inch shank diameter and 0.152-inch square drive. Suitable for blind-hole and through-hole threading in cast iron, stainless steel, and steel workpieces.

Installation Notes

This tap is installed and driven by a qualified machinist or maintenance technician using a tap wrench, T-handle, or appropriate tapping fixture. Secure the workpiece firmly and ensure the tap is started perpendicular to the hole to prevent tap breakage and thread misalignment. Apply a suitable cutting fluid for the workpiece material — especially important when tapping stainless steel — to reduce heat buildup and extend tap life. Inspect the tap for chipping or wear before each use, as a damaged tap can produce out-of-tolerance threads or break inside the part.