Osg 662 Straight Flute Tap M8x0.75 Metric Fine Plug 2B Hss

Product Description

The OSG 662 is a straight flute tap designed for cutting internal M8x0.75 metric fine threads in a range of ferrous and non-ferrous materials. It features 4 flutes with a plug chamfer, a 2B class of fit, and is manufactured from high-speed steel with a bright, uncoated finish. The tap has a 20 mm thread length and a 70 mm overall length, making it suitable for standard through-hole and shallow blind-hole applications. It is a right-hand thread tap intended for use in machine tapping operations across production and maintenance environments. Machinists, tool and die makers, and maintenance technicians are the primary users of this tool.

This tap is designed for metric fine thread applications requiring an M8x0.75 thread profile. It is suited for use in job shops, production machining, and MRO settings where precision internal threading is required. The plug chamfer style provides a gradual thread lead-in, making it well-suited for through-hole tapping. The 6.2 mm shank diameter is compatible with standard tap holders and chucks used in CNC machining centers, drill presses, and tapping machines.

Key Features

• M8x0.75 metric fine thread profile with 2B class of fit for controlled thread tolerance
• 4-flute straight flute design suited for through-hole and short blind-hole applications
• Plug chamfer with approximately 3 to 5 thread lead-in for gradual thread engagement
• High-speed steel construction provides wear resistance across a range of workpiece materials
• Bright, uncoated finish compatible with cutting fluids and standard tap lubricants
• Right-hand thread cut, 20 mm thread length, 70 mm overall length

Compatibility

Rated for use in aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces. Fits standard tap holders with a 6.2 mm shank diameter.

Installation Notes

This tap should be installed in a properly sized tap holder or chuck rated for the shank diameter before use. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill diameter for an M8x0.75 thread prior to tapping. Apply an appropriate cutting fluid or tapping compound for the workpiece material to extend tool life and improve thread quality. Follow standard machine shop safety practices, including powering down the machine before changing tooling.