Osg 2890501 Spiral Point Tap M3.5x0.60 Metric Coarse 6H

Product Description

The OSG 2890501 is a spiral point tap designed for threading M3.5x0.60 metric coarse threads in a wide range of metallic materials. Built from vanadium high-speed steel (HSS-E) with a steam oxide coating, this plug chamfer tap is engineered for durability and chip control in production tapping operations. The 3-flute spiral point geometry pushes chips forward ahead of the cut, making it well suited for through-hole applications. The D4 thread limit and 6H class of fit deliver consistent tolerance control, and the right-hand thread direction matches standard tapping setups. Overall length is 2 inches with a thread length of 11/16 inches.

This tap is used in machine shop, maintenance, and production environments where M3.5x0.60 metric coarse threads are required. It is appropriate for through-hole tapping in aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, cast iron, and hardened steel. It is installed in CNC machining centers, drill presses, and tapping machines. Licensed machinists and tooling technicians are the typical end users for this type of cutting tool.

Key Features

• M3.5x0.60 metric coarse thread form with 6H class of fit and D4 thread limit for consistent tolerance
• Vanadium high-speed steel (HSS-E) construction for improved wear resistance over standard HSS
• Steam oxide coating reduces friction and provides moderate corrosion resistance
• 3-flute spiral point geometry pushes chips forward, ideal for through-hole tapping
• Plug chamfer provides gradual thread engagement and reduces entry force
• Right-hand thread direction, no coolant-through required, non-interrupted thread form

Compatibility

Designed for through-hole tapping of M3.5x0.60 metric coarse threads in aluminum, hardened steel, stainless steel, high-carbon steel, low-carbon steel, medium-carbon steel, alloy steel, die steel, and cast iron. Part of OSG Series 289.

Installation Notes

Power down or disable the tapping machine before securing the tap in the holder. Use a properly sized tap holder or tapping chuck rated for the shank diameter to prevent slippage or tool breakage. Apply appropriate cutting fluid for the workpiece material to extend tool life and maintain thread quality. Inspect the tap for wear or chipping before each use, as a damaged cutting edge can cause out-of-tolerance threads or tap breakage in the hole.