Cleveland C54376 Hand Tap M5x0.80 Bottoming Hss

Product Description

The CLEVELAND C54376 is a straight-flute hand tap designed for cutting M5x0.80 metric coarse internal threads in both blind and through-hole applications. Built from high-speed steel (HSS) with a bright, uncoated finish, this tap features a bottoming chamfer that allows threading close to the bottom of a blind hole. With 4 flutes and a right-hand thread direction, it holds a 6H class of fit and D4 thread limit, making it suitable for precision threading work in machine shops, maintenance, and fabrication environments. Overall length is 2.375 inches with a 0.500-inch thread length. Machinists, tool-and-die workers, and maintenance technicians are the primary users.

This tap is suited for threading operations in a range of materials including alloy steel, carbon steel, aluminum, and free-machining stainless steel. It performs in both blind-hole threading scenarios where a bottoming chamfer is required to maximize thread depth, and in standard through-hole threading. The Series 1003 designation places it within a widely used general-purpose hand tap line. It fits typical hand tapping applications on the bench or in combination with a tapping handle or fixture, and is sold in single-unit quantities.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• 4-flute straight-flute geometry for right-hand metric coarse threads
• High-speed steel construction for durability across common ferrous and non-ferrous materials
• Bright uncoated finish — no coating buildup to affect thread tolerance
• 6H class of fit with D4 thread limit for standard metric thread precision
• Compatible with both blind-hole and through-hole threading applications

Compatibility

Designed for use in alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces requiring M5x0.80 metric coarse internal threads. Suitable for blind-hole and through-hole threading operations per the Series 1003 product specification.

Installation Notes

Machinists and maintenance technicians should secure the workpiece before tapping and ensure proper alignment of the tap with the drilled hole to avoid tap breakage. Use a suitable cutting fluid or tapping oil appropriate to the workpiece material to extend tool life and improve thread quality. For blind holes, clear chips frequently to prevent packing, which can break the tap. Follow applicable shop safety practices when using hand tapping tools.