Cleveland C55154 Hand Tap 1-12 Unf Plug Rh Tin Hss

Product Description

The CLEVELAND C55154 is a 1-12 UNF high speed steel hand tap designed for cutting internal threads in a range of metalworking applications. Built to a plug chamfer style with a right-hand thread direction, it produces Class 3B threads to H4 thread limit tolerances, making it suitable for close-tolerance work. The tap features four straight flutes and a titanium nitride (TiN) coating that extends tool life by reducing friction and improving wear resistance. Overall length is 5.125 inches with a thread length of 2.5 inches. It is installed by machinists and toolroom operators using a standard tap wrench or machine setup.

This tap is suited for both blind-hole threading and through-hole threading operations. It performs in alloy steel, carbon steel, aluminum, and free-machining stainless steel workpieces, making it a versatile choice across production and maintenance machining environments. The 1002TN series is a standard-geometry tap appropriate for general shop use where TiN coating is specified for improved surface life. Shank diameter is 0.8 inches and the square drive measures 0.6 inches across, fitting standard tap wrenches and holders sized for this shank.

Key Features

• 1-12 UNF thread form, right-hand, Class 3B fit to H4 thread limit
• Plug chamfer style for starting ease in both through-holes and blind holes
• TiN coating reduces friction and extends cutting tool life in production use
• High speed steel construction handles alloy steel, carbon steel, aluminum, and free-machining stainless steel
• Four straight flutes provide chip clearance in standard threading operations
• 0.8-inch shank diameter with 0.6-inch square drive for secure tap wrench or holder engagement

Compatibility

Designed for use in alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces requiring a 1-12 UNF internal thread. Suitable for both blind-hole and through-hole threading applications in manual and machine tapping setups.

Installation Notes

This tap is installed by machinists using a calibrated tap wrench or tapping head. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill size for a 1-12 UNF thread before starting. Apply cutting fluid appropriate to the workpiece material to protect the cutting edges and improve thread finish. For blind-hole work, monitor depth carefully to avoid bottoming the tap under load.