Osg 1645505084 Spiral Flute Tap M5x0.80 Tin Vanadium Hss

Product Description

The OSG 1645505084 is a spiral flute tap designed to cut internal M5x0.80 metric threads in blind and through holes. Built from vanadium high-speed steel and finished with a titanium nitride (TiN) coating, this tap delivers extended tool life in demanding cutting applications. The 45-degree helix angle evacuates chips up and out of the hole, reducing the risk of chip packing in blind-hole operations. With a modified bottoming chamfer and a D4 thread limit, it produces 6H-class threads with tight dimensional control. Machinists and toolroom mechanics use this tap in CNC machining centers, drill presses, and hand-tapping fixtures.

The 1645505084 is suited for tapping M5x0.80 threads in a range of ferrous materials. Rated material applications include alloy steel, cast iron, high-carbon steel, low-carbon steel, medium-carbon steel, and stainless steel. The right-hand flute direction and right-hand thread make it a standard-rotation tap compatible with conventional spindle setups. It is part of OSG Series 16455 and is commonly used in production shops, maintenance environments, and job shops requiring reliable metric threading on small-diameter fastener holes.

Key Features

• M5x0.80 metric thread profile with 6H class of fit for standard tolerance threading
• 45-degree spiral flute helix for efficient chip evacuation in blind holes
• Modified bottoming chamfer allows threading closer to the bottom of a blind hole
• TiN coating increases surface hardness and reduces friction for longer tool life
• Vanadium high-speed steel construction handles a broad range of ferrous workpiece materials
• D4 thread limit provides consistent oversize control across production runs

Compatibility

Rated for use in alloy steel, cast iron, high-carbon steel, low-carbon steel, medium-carbon steel, and stainless steel. Part of OSG Series 16455.

Installation Notes

This tap is installed and driven by a machinist or toolroom mechanic using a standard tap holder, tapping head, or CNC rigid-tapping setup. Always ensure the pilot hole diameter is correct for M5x0.80 threads before tapping. Secure the workpiece firmly and use an appropriate cutting fluid for the workpiece material to protect the tool and achieve accurate thread form. Inspect the tap for wear or chipping before each use and replace if the cutting edges show damage.