Osg 1651004408 Spiral Point Tap M4.5x0.50 Metric Coarse

Product Description

The OSG 1651004408 is a spiral point tap designed for machine tapping of through-holes in a wide range of ferrous and non-ferrous metals. Part of the EXOTAP VC-10 Series 16510, it cuts an M4.5x0.50 metric coarse thread to a 6H class of fit with a D3 thread limit. The powdered metal construction paired with a V coating delivers extended tool life and reduced friction at the cutting edge. The plug chamfer style makes it suited for through-hole applications where chip flow in the forward direction is preferred. Installed by machinists and toolroom technicians in CNC and manual tapping operations.

This tap is rated for use in alloy steel, aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, medium-carbon steel, stainless steel, and die steel. Its right-hand thread direction and three-flute geometry support consistent chip evacuation in production tapping environments. The 70 mm overall length fits standard tap holders used in vertical machining centers and drill presses. No coolant-through feature; external coolant or cutting fluid application is standard practice with this tap.

Key Features

• M4.5x0.50 metric coarse thread, 6H class of fit, D3 thread limit for precise tolerance control
• Powdered metal substrate with V (VC-10) coating for extended wear resistance
• 3-flute spiral point geometry pushes chips forward, ideal for through-hole tapping
• Plug chamfer style for standard through-hole entry and chip clearance
• Right-hand thread direction, compatible with conventional tapping spindles
• No coolant-through requirement; suitable for flood or mist external coolant delivery

Compatibility

Designed for use in standard tap holders and tapping heads that accept a 4.9276 mm shank diameter with a 6.35 mm square drive. Compatible with CNC machining centers, drill presses, and tapping machines set up for M4.5x0.50 metric coarse thread production.

Installation Notes

Installation should be performed by qualified machinists familiar with tapping speeds and feeds appropriate to the workpiece material. Secure the tap in a floating or rigid tap holder per machine specifications and ensure the workpiece is firmly fixtured before operation. Apply an appropriate cutting fluid or coolant to the tap and hole entry to reduce heat and extend tool life. Inspect the tap for wear or chipping before each use and replace if cutting edges show degradation.