Cleveland C54504 Hand Tap 5/16-18 Unc Taper 4-flute Hss

Product Description

The CLEVELAND C54504 is a 5/16-18 UNC straight-flute hand tap designed for cutting internal threads in a variety of metallic workpieces. Built from high speed steel with a bright uncoated finish, this tap features a taper chamfer that guides the tool into the workpiece gradually, reducing the force required to start the thread. Four flutes provide chip clearance and cutting efficiency. With an overall length of 2.719 inches and a thread length of 0.69 inches, the C54504 is sized for bench-top and machine tapping operations performed by machinists, tool-and-die makers, and maintenance technicians.

This tap is suited for both blind-hole and through-hole threading applications in production and repair environments. The 3B class of fit and H3 thread limit make it appropriate for standard tolerance internal threads. Compatible material applications include alloy steel, carbon steel, aluminum, and free-machining stainless steel, making it a versatile choice for job shops and maintenance departments working across multiple material types.

Key Features

• 5/16-18 UNC thread size with taper chamfer for progressive thread engagement
• High speed steel construction for durability across a range of workpiece materials
• Bright uncoated finish suitable for general-purpose threading with cutting fluids
• 4-flute straight-flute geometry supports chip evacuation in blind and through holes
• H3 thread limit and 3B class of fit for standard tolerance internal threads
• Right-hand thread direction, Series 1001

Compatibility

Designed for blind-hole and through-hole threading in alloy steel, carbon steel, aluminum, and free-machining stainless steel. Compatible with standard 5/16-18 UNC tap holders and tapping heads that accept a 0.318-inch shank diameter.

Installation Notes

Hand taps of this type are installed by machinists and maintenance technicians using a tap wrench or tapping fixture. Always apply an appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Ensure the workpiece is securely fixtured and the tap is started perpendicular to the workpiece surface to avoid cross-threading or breakage. Back the tap out periodically to break and clear chips, especially in blind-hole applications.