Osg 31440308 Spiral Point Sti Tap 6-32 Unc 3 Flutes

Product Description

The OSG 31440308 is a spiral point STI tap designed for threading 6-32 UNC holes in metalworking applications. Spiral point geometry pushes chips forward ahead of the cutting zone, making this tap well suited for through-hole tapping where chip evacuation is critical. Built from powdered metal with a V finish, the 31440308 offers improved wear resistance compared to standard high-speed steel. It carries a plug chamfer, an H3 thread limit, and a 2B class of fit, delivering threads within the tolerance range required for most standard fastener assemblies. Overall length is 2.382 inches with a thread length of 0.874 inches. Machinists, tool-and-die makers, and maintenance technicians install this tap in CNC machines, drill presses, or hand-tapping setups.

The 31440308 is applied in production and maintenance environments where 6-32 UNC internal threads are required. The plug chamfer provides a gradual lead-in of approximately 3 to 5 threads, making it appropriate for through-hole applications rather than blind-hole bottom tapping. The powdered metal construction supports use across a range of workpiece materials common in light manufacturing and mechanical assembly. The Series 314Ti designation identifies this tap within the OSG STI product line, which targets thread repair and insert preparation work.

Key Features

• Spiral point design pushes chips forward for efficient through-hole tapping
• Powdered metal construction with V finish for extended tool life
• Plug chamfer with H3 thread limit and 2B class of fit for standard tolerance threading
• 3 flutes provide balanced cutting action and chip flow
• 0.874-inch thread length suits typical through-hole fastener depths at 6-32 UNC
• Compact shank diameter of 0.194 inches fits standard tap holders and chucks

Compatibility

Designed for use in standard tap holders, chucks, and tapping heads configured for 6-32 UNC thread production in through-hole applications.

Installation Notes

This tap should be installed by qualified machinists or maintenance technicians familiar with thread-cutting tooling and proper tap alignment. Ensure the workpiece is securely fixtured and the spindle or tap handle is properly aligned to the hole axis before cutting begins. Use an appropriate cutting fluid or tapping compound for the workpiece material to reduce heat and extend tool life. Never reverse a broken tap without the proper extraction tooling, and follow shop safety protocols when handling cutting tools.