Hertel K020139AS25 Spiral Point Tap M4.5x0.75 Metric Coarse

Product Description

The HERTEL K020139AS25 is a spiral point tap designed for cutting internal metric coarse threads in a range of ferrous and non-ferrous workpiece materials. It features a plug chamfer for through-hole threading applications and is manufactured from high speed steel with a TiN (titanium nitride) coating to extend tool life and reduce friction during the cutting cycle. The tap has 2 flutes, a D2 thread limit for controlled tolerance fits, and a thread length of 0.875 inches. Shank diameter is 0.194 inches. Thread direction is right hand. This tool is sized for M4.5 x 0.75 metric coarse thread form and is suited to production and maintenance machining environments.

This tap is appropriate for threading through-holes in light manufacturing, maintenance and repair operations, and general machining applications where M4.5 x 0.75 metric coarse threads are specified. The plug chamfer makes it well suited for through-hole work where the tap can pass fully through the material. It is used by machinists, tool and die makers, and maintenance technicians working on metric-threaded assemblies in industrial and commercial settings.

Key Features

• M4.5 x 0.75 metric coarse thread form for standard metric fastener compatibility
• TiN coating reduces friction and increases cutting edge wear resistance
• Plug chamfer (3-5 thread lead) optimized for through-hole threading
• D2 thread limit provides controlled tolerance for standard fit applications
• High speed steel construction suitable for steel, cast iron, and non-ferrous materials
• Right-hand thread direction; coolant-through feature not included

Compatibility

Designed as a direct-use spiral point tap for through-hole applications requiring M4.5 x 0.75 metric coarse internal threads. Fits standard tap holders and chucks accepting a 0.194-inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist using a properly aligned tapping fixture, CNC machine, or drill press with a tapping attachment to prevent tap breakage. Ensure the workpiece is securely clamped and the pilot hole is drilled to the correct tap drill diameter for M4.5 x 0.75 before tapping. Use an appropriate cutting fluid for the workpiece material. Never force the tap if resistance is encountered; back off to clear chips before continuing.