Osg 2988200 Spiral Flute Tap M5x0.80 Bottoming 6H Hss

Product Description

The OSG 2988200 is a spiral flute bottoming tap designed for cutting M5x0.80 metric coarse internal threads in blind holes. It is manufactured from high-speed steel with a bright, uncoated finish and features a 50-degree helix angle that evacuates chips upward for clean, consistent thread formation. With a 6H class of fit and 3 flutes, this tap suits precision threading applications where close tolerances are required. The overall length is 2-3/8 inches, and the shank diameter measures 0.194 inches. It is installed by machinists and tool-and-die professionals using a standard tap wrench or CNC tapping attachment.

This tap is suited for threading aluminum and carbon steel workpieces in production and job-shop environments. The bottoming chamfer design allows the tap to cut threads close to the bottom of a blind hole, making it the correct choice when full thread depth near the bottom of a bore is required. It is a right-hand tap producing right-hand threads, and coolant-through capability is not available on this model. Typical applications include machine component fabrication, fixture building, and repair work requiring M5 metric threaded holes.

Key Features

• M5x0.80 metric coarse thread form with 6H class of fit for close-tolerance blind-hole threading
• Bottoming chamfer style allows threading to near the bottom of a blind bore
• 50-degree right-hand spiral flute geometry promotes upward chip evacuation
• High-speed steel construction provides durability across aluminum and carbon steel applications
• Bright, uncoated finish maintains consistent cutting geometry without buildup on softer materials
• 3-flute design balances chip removal capacity with tap body strength at this thread diameter

Compatibility

Designed as an OEM-style threading tool compatible with standard M5x0.80 metric coarse tap holders, tap wrenches, and CNC rigid tapping chucks. Rated for use in aluminum and carbon steel per manufacturer material application data.

Installation Notes

This tap should be installed by a qualified machinist or tooling technician. Secure the workpiece fully before tapping and ensure the tap is aligned perpendicular to the bore axis to avoid tap breakage. For blind-hole applications, verify hole depth provides adequate chip clearance below the final thread depth. Apply a suitable cutting fluid appropriate for the workpiece material before and during tapping to extend tool life and improve thread quality.