Hertel K027718AS M2.5x0.45 Bottoming Tap 3 Flutes Hss

Product Description

The HERTEL K027718AS is a straight flute tap designed for cutting M2.5x0.45 Metric Coarse internal threads in bottoming applications. Built from high-speed steel (HSS) with a bright, uncoated finish, this tap is suited for threading blind holes where full thread depth close to the bottom is required. The 3-flute straight design provides stability and chip control in a range of materials. With an overall length of 1-13/16 inches and a right-hand thread direction, the K027718AS meets 6H class of fit tolerances, making it appropriate for standard precision threading work in machining and fabrication environments.

This tap is used in machine shop, maintenance, and fabrication settings where small-diameter metric threads are required. The bottoming chamfer allows threading to within a few threads of the bottom of a blind hole, which is critical in tight assemblies. It is appropriate for use in manual tapping setups and compatible with standard tapping machines. Machinists, tool and die makers, and maintenance technicians working with metric hardware will find this tap suited to their small-thread applications.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• M2.5x0.45 Metric Coarse thread form with 6H class of fit
• 3 straight flutes for consistent chip formation and stability
• High-speed steel construction for wear resistance across common workpiece materials
• Bright/uncoated finish - no coating buildup to affect thread tolerance
• Right-hand thread direction, D3 thread limit

Compatibility

Designed as a standard replacement or production tap for M2.5x0.45 Metric Coarse bottoming applications where a 6H class of fit is specified.

Installation Notes

This tap should be installed and used by qualified machinists or maintenance technicians familiar with proper tapping procedures. Always secure the workpiece and ensure the tap is aligned perpendicular to the drilled hole before beginning the threading operation. Apply appropriate cutting fluid for the workpiece material to reduce friction and extend tap life. Do not force the tap - back off periodically to break chips and prevent tap breakage in blind holes.