Cleveland C54030 Hand Tap 0-80 Unf Bottoming Hss

Product Description

The CLEVELAND C54030 is a 0-80 UNF bottoming hand tap designed for cutting internal threads in metalworking applications. Built from high speed steel with a bright uncoated finish, it produces clean, accurate threads in blind holes and through-holes. The bottoming chamfer allows threading to the bottom of blind holes where plug or taper taps cannot reach. With 2 straight flutes and a right-hand thread direction, this tap is suited to manual tapping operations using a standard tap wrench. Overall length is 1.625 inches with a thread length of 0.31 inches and a 3/16-inch square drive end.

This tap is intended for use in precision metalworking on alloy steel, aluminum, carbon steel, and free-machining stainless steel. The 0-80 thread size is common in instrument work, optical assemblies, miniature fastener applications, and other fine-thread machining scenarios. Class of fit is 2B with an H2 thread limit, suitable for general-purpose internal threading to standard UNF tolerances. It is appropriate for use in machine shops, tool rooms, and maintenance environments requiring fine-pitch hand tapping.

Key Features

• Bottoming chamfer enables threading to the base of blind holes
• High speed steel construction provides durability across ferrous and non-ferrous materials
• Bright uncoated finish maintains sharp cutting edges without coating buildup
• 2-flute straight flute design suited for manual hand tapping
• H2 thread limit with 2B class of fit for standard UNF tolerance requirements
• Compatible with alloy steel, aluminum, carbon steel, and free-machining stainless steel

Compatibility

Designed for blind hole and through-hole threading applications in alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces requiring a 0-80 UNF internal thread.

Installation Notes

This tap is installed by machinists and toolroom technicians using a standard tap wrench sized for the square drive end. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill diameter for a 0-80 thread before starting. Apply appropriate cutting fluid for the workpiece material to extend tap life and improve thread finish. Avoid over-torquing on this fine thread size, as small-diameter taps are susceptible to breakage if misaligned or forced.