Osg 1105612108 Spiral Point Tap 3/8-16 Unc Ticn

Product Description

The OSG 1105612108 is a spiral point plug tap designed for threading 3/8-16 UNC holes in tough materials including hardened steel, stainless steel, high-nickel alloys, titanium, and alloy steel. Built from powdered metal with a TiCN (Titanium Carbonitride) coating, this tap delivers superior wear resistance and heat dissipation compared to standard high-speed steel alternatives. The spiral point geometry pushes chips forward ahead of the cutting zone, making it well suited for through-hole tapping operations where chip evacuation is critical. It carries an H3 thread limit and a 3B class of fit for general-purpose precision threading.

This tap is intended for use in machining environments where difficult workpiece materials demand a more durable tooling solution. The TiCN coating provides a hard, low-friction surface that extends tool life when threading stainless steel, titanium, and nickel-based alloys - materials that are prone to work hardening and galling. It is appropriate for use on CNC machining centers, manual mills, and drill presses equipped with a tapping head. Machinists and tool-and-die professionals working in job shops, aerospace component manufacturing, and industrial production environments will find this tap applicable to a wide range of through-hole tapping applications.

Key Features

• TiCN coating increases surface hardness and reduces friction for extended tool life in abrasive materials
• Powdered metal substrate provides superior toughness and wear resistance over conventional HSS
• Spiral point geometry pushes chips forward, optimizing chip flow in through-hole applications
• H3 thread limit with 3B class of fit for consistent, precise thread tolerance
• Right-hand thread direction, 3 flutes, plug chamfer for easy thread entry and alignment
• No coolant-through design; suitable for use with external cutting fluid application

Compatibility

Designed for through-hole tapping of 3/8-16 UNC threads in hardened steel, stainless steel, high-nickel alloy, titanium, and alloy steel workpieces. Part of the OSG Series 312TI product line.

Installation Notes

This tap should be installed and operated by a qualified machinist familiar with tapping speeds, feeds, and cutting fluid selection for the target workpiece material. Always power down and lock out the machine before changing tooling. Use a suitable cutting fluid or tapping compound rated for the workpiece material - dry tapping is not recommended for stainless steel or titanium. Verify that the tap is properly aligned with the pilot hole before engaging the cut to prevent tap breakage.