Cleveland C54456 Hand Tap 1/4-20 Plug Hss Bright Unc

Product Description

The CLEVELAND C54456 is a 1/4-20 straight flute hand tap designed for cutting internal threads in both blind holes and through-holes. Built from high speed steel with a bright uncoated finish, this tap runs in right-hand direction with a plug chamfer that starts the thread progressively into the workpiece. The 2-flute design suits general-purpose hand tapping applications. It conforms to UNC thread standards, Class 3B fit, with an H3 thread limit for controlled tolerance. Overall length is 2.5 inches and thread length is 0.63 inches, making it a compact, practical tool for production and maintenance tapping work. Machinists, toolmakers, and maintenance technicians are the primary users.

The C54456 is suited for tapping 1/4-20 UNC threads in a range of ferrous and non-ferrous materials. It performs in both blind hole and through-hole threading scenarios. Material applications include alloy steel, aluminum, carbon steel, and free-machining stainless steel. The straight flute geometry is best for through-hole work and shorter blind holes where chip clearance is manageable. This tap is part of the Cleveland Series 1002 line, intended for hand tapping operations in shop, field, and maintenance environments.

Key Features

• Plug chamfer for progressive thread engagement at the start of the cut
• High speed steel construction for durability across steel and aluminum applications
• Bright uncoated finish — no coating buildup to affect thread tolerance
• 2-flute straight flute design for general-purpose blind and through-hole hand tapping
• H3 thread limit holds consistent oversize tolerance for Class 3B fit
• UNC thread standard, right-hand direction

Compatibility

Designed as an OEM-style hand tap for standard 1/4-20 UNC tapping applications in alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces. Fits standard tap wrenches and T-handle holders accepting a 0.255-inch shank diameter.

Installation Notes

Hand tapping should be performed with the workpiece securely fixtured or clamped. Use appropriate cutting fluid for the material being tapped to reduce friction and extend tap life. Back the tap off periodically to break chips, particularly in blind holes. Always ensure the tap is started square to the hole to avoid thread misalignment or tap breakage.