Cleveland C54305 M4.5x0.75 Bottoming Hand Tap Hss

Product Description

The CLEVELAND C54305 is a straight-flute hand tap designed for threading M4.5 x 0.75 metric coarse threads in both blind and through-hole applications. Built from high speed steel with a bright, uncoated finish, it features a bottoming chamfer that allows threading to the bottom of a blind hole with minimal clearance. The tap carries a 6H class of fit with a D4 thread limit, delivering consistent tolerance control on close-fit threaded assemblies. With four flutes and a 2.375 inch overall length, it is sized for hand-tapping operations in precision machining, maintenance, and repair environments.

This tap is suited for production and job-shop use where metric coarse threads must be cut in a range of common materials. The bottoming chamfer configuration makes it the finishing tap in a tap sequence, used after a taper or plug tap has started the thread. It is appropriate for use in alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces. At 0.5 inch thread length and a 0.194 inch shank diameter, it fits standard tap wrenches and tapping heads configured for this size range.

Key Features

• Bottoming chamfer for threading to the bottom of blind holes
• High speed steel construction for durability across a range of ferrous and non-ferrous materials
• 4-flute straight flute geometry for chip control in through-hole and blind-hole threading
• 6H class of fit with D4 thread limit for consistent metric coarse thread tolerance
• Bright, uncoated finish — no coolant-through requirement
• Series 1003 design for general-purpose hand and machine tapping

Compatibility

Designed for cutting M4.5 x 0.75 metric coarse threads in alloy steel, aluminum, carbon steel, and free-machining stainless steel. Compatible with standard tap wrenches and tapping heads accepting a 0.194 inch shank diameter.

Installation Notes

Tapping operations should be performed by a qualified machinist or maintenance technician familiar with metric thread standards. Secure the workpiece firmly before beginning; back the tap out periodically to break chips and prevent binding, especially in blind holes. Use an appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Follow applicable shop safety practices regarding rotating tooling and cutting fluids.