Osg 1651507408 Spiral Point Tap 1-14 Uns 3 Flute Plug

Product Description

The OSG 1651507408 is a spiral point tap designed for cutting right-hand internal threads to a 1-14 UNS specification with a 6H class of fit and H6 thread limit. Built from powdered metal and finished with a V (VC-10) coating, this plug-chamfer tap is engineered for threading operations in demanding materials. The spiral point geometry drives chips forward ahead of the cutting edge, reducing chip-related obstructions in through-hole applications. With a 5.512-inch overall length and a 1.5-inch thread length, it fits standard tap holders used in machining centers and manual tapping setups. Licensed machinists and toolroom technicians are the primary users of this tap in production and maintenance environments.

This tap is suited for through-hole threading in a wide range of materials, including alloy steel, low-, medium-, and high-carbon steel, hardened steel, die steel, cast iron, stainless steel, aluminum, cast aluminum, and other machinable metals. The plug chamfer makes it appropriate for starting in pre-drilled through holes rather than blind holes. It is part of OSG Series 16515 and is used in both production machining and maintenance-repair-operations contexts where a reliable, coated powdered-metal tap is required.

Key Features

• 1-14 UNS thread form with 6H class of fit and H6 thread limit for precise tolerance control
• V (VC-10) coating improves wear resistance and reduces friction in ferrous and non-ferrous applications
• Powdered metal construction provides consistent hardness and extended tool life over high-speed steel alternatives
• Spiral point geometry pushes chips forward, making it optimal for through-hole tapping
• Plug chamfer allows clean thread starts in pre-drilled through holes
• Right-hand thread direction; no coolant-through feature required for standard tapping setups

Compatibility

Designed as an OEM-style threading tool for use in standard tap holders and tapping heads compatible with the shank diameter and overall length of this series. Specific machine or holder compatibility should be verified against the 0.8-inch shank diameter and 5.512-inch overall length prior to installation.

Installation Notes

Installation and use of this tap should be performed by qualified machinists or toolroom technicians familiar with threading operations and cutting tool safety. Always ensure the workpiece is securely fixtured and the spindle or tapping head is at a complete stop before loading or removing the tap. Verify the pre-drilled hole diameter matches the recommended tap drill size for a 1-14 UNS thread before starting. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain thread quality.