Cleveland C54464 Hand Tap 1/4-20 Unc Plug 4-flute Hss

Product Description

The CLEVELAND C54464 is a 1/4-20 UNC straight flute hand tap designed for threading operations in both blind holes and through-holes. Made from bright, uncoated high speed steel, this plug chamfer tap features four flutes and a right-hand thread direction. It carries an H11 thread limit with 0.005 inches oversize tolerance, making it appropriate for applications where a slightly larger thread fit is required. The 2.5-inch overall length and 0.63-inch thread length suit common fastener threading tasks on the bench or in a machine shop. Machinists and tool-and-die technicians are the primary users.

This tap is suited for threading ferrous and non-ferrous materials including alloy steel, carbon steel, aluminum, and free-machining stainless steel. The plug chamfer style — with a moderate lead-in — handles both starting and finishing passes in most general-purpose threading scenarios. It fits standard tap wrench drives via its square drive shank. The Series 1002 designation places it in a well-established Cleveland catalog line intended for production and maintenance threading work across job shops and manufacturing environments.

Key Features

• 1/4-20 UNC right-hand thread, plug chamfer for versatile blind and through-hole use
• H11 thread limit with 0.005 inches oversize for controlled fit tolerance
• 4-flute straight flute geometry suited for most general-purpose materials
• Bright, uncoated high speed steel construction — no coating to affect dimensional fit
• 0.255-inch shank diameter with 0.3125-inch square drive length for standard tap wrenches
• Compatible with alloy steel, carbon steel, aluminum, and free-machining stainless steel

Compatibility

Designed for blind hole and through-hole threading applications in alloy steel, carbon steel, aluminum, and free-machining stainless steel. Fits standard tap wrenches and holders sized for a 0.255-inch shank diameter.

Installation Notes

Machinists and maintenance technicians install hand taps using a tap wrench or suitable tapping fixture. Always ensure the workpiece is securely clamped and the tap is started perpendicular to the hole surface to prevent cross-threading or tap breakage. Power down any machine before manually tapping a hole on a workpiece still fixtured in equipment. Apply appropriate cutting fluid for the material being tapped to extend tap life and improve thread quality.