Osg 1980101 Spiral Point Tap M3x0.50 Metric Coarse 6H Hss

Product Description

The OSG 1980101 is a spiral point tap designed to cut M3x0.50 metric coarse internal threads in through-hole applications. It features a plug chamfer style, 2-flute geometry, and is manufactured from high-speed steel (HSS) with a steam oxide coating. The oxide finish provides corrosion resistance and mild lubricity during the tapping operation. At 49.2 mm overall length with a thread length of 5/8 inches (8.3 mm), this is a compact tap suited for small-diameter threading work. The D3 thread limit and 6H class of fit make it appropriate for standard metric thread tolerances used in general machining and fabrication.

This tap is commonly used in machine shops, maintenance and repair operations, and production environments where M3 metric threaded holes are required. The spiral point design pushes chips forward ahead of the tap, making it well suited for through-hole tapping on CNC machining centers, drill presses, and tapping machines. Material compatibility includes aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel, giving it broad utility across ferrous and non-ferrous workpieces.

Key Features

• M3x0.50 metric coarse thread form with 6H class of fit and D3 thread limit
• Spiral point geometry pushes chips forward, ideal for through-hole tapping
• High-speed steel construction for durability across a wide range of materials
• Steam oxide coating improves corrosion resistance and reduces friction during use
• Plug chamfer for standard starting in pre-drilled through holes
• Right-hand thread direction, no coolant-through, no interrupted thread

Compatibility

Compatible with aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel workpieces requiring M3x0.50 metric coarse through-hole threads.

Installation Notes

Installation should be performed by a machinist or qualified technician using a properly aligned tapping fixture, CNC spindle, or manual tap handle. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct minor diameter before tapping. Apply an appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Inspect the tap for wear or damage before each use and replace if chipping or dullness is observed.