Osg 2890801 Spiral Point Tap M5x0.80 Metric Coarse 6H

Product Description

The OSG 2890801 is a spiral point tap designed for threading M5x0.80 metric coarse internal threads in a wide range of ferrous and non-ferrous workpiece materials. Built from vanadium high-speed steel (HSS-E) with a steam oxide coating, this plug-style tap offers improved lubricity and resistance to built-up edge during cutting. It features three flutes and a right-hand thread direction, producing a 6H class of fit with D4 thread limit tolerance. The spiral point geometry pushes chips forward ahead of the tap, making it well suited for through-hole tapping operations. Licensed trades machinists, tool-and-die workers, and maintenance technicians are the primary installers.

This tap is intended for through-hole threading applications across a broad spectrum of materials including aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, and cast iron. The plug chamfer makes it a general-purpose choice for production and repair tapping where the tap can pass fully through the workpiece. It belongs to OSG Series 289 and is supplied as a single-piece unit.

Key Features

• M5x0.80 metric coarse thread form with 6H class of fit and D4 thread limit
• Vanadium high-speed steel (HSS-E) construction for increased wear resistance
• Steam oxide coating reduces friction and improves chip flow
• Three-flute spiral point geometry pushes chips forward for through-hole applications
• Plug chamfer for general-purpose tapping in production and maintenance environments
• Right-hand thread direction, no coolant-through, non-interrupted thread form

Compatibility

Designed as a standard metric coarse spiral point tap for use in CNC machining centers, drill presses, and hand tapping operations requiring an M5x0.80 thread with a 6H tolerance class.

Installation Notes

This tap should be installed and operated by qualified machinists or maintenance technicians familiar with tapping feeds, speeds, and cutting fluid requirements for the workpiece material. Always secure the workpiece fully before tapping and align the tap perpendicular to the drilled hole to prevent tap breakage. Use an appropriate cutting fluid or tapping compound for the material being threaded. Never reverse a broken tap manually without proper extraction tooling.