Osg 1712701 Spiral Point Sti Tap 6-32 Unc 3 Flutes

Product Description

The OSG 1712701 is a spiral point STI (Screw Thread Insert) tap designed for cutting 6-32 UNC internal threads intended to accept Heli-Coil or similar wire thread inserts. Built from vanadium high-speed steel with a black oxide finish, it delivers consistent cutting performance in through-hole tapping applications. The plug chamfer provides a gradual lead into the cut, making it well suited for production tapping where a starting taper is acceptable. With an overall length of 2.382 inches and a thread length of 0.44 inches, this tap fits standard tap holders for small-diameter threading work.

The OSG 1712701 is used in metalworking, maintenance, and repair applications where a stripped or damaged 6-32 UNC thread needs to be restored using a thread insert system. STI taps cut an oversized thread profile to accept the insert, which then presents a standard internal thread diameter once installed. This tap is appropriate for use in steel, aluminum, cast iron, and similar materials by machinists, maintenance mechanics, and tool-and-die professionals working in both shop and field environments.

Key Features

• Spiral point design pushes chips ahead of the cut, keeping flutes clear in through-hole applications
• Vanadium high-speed steel construction provides wear resistance and toughness in ferrous and non-ferrous metals
• Black oxide finish reduces friction and provides light corrosion protection during storage and use
• Plug chamfer (H3 thread limit) delivers controlled oversize tolerance for consistent insert fitment
• 3-flute geometry balances chip clearance and tool strength at small diameters
• Series 301 designation follows OSG standard STI tap specifications for 6-32 UNC

Compatibility

Designed as an STI tap for use with Heli-Coil and equivalent wire thread insert systems in 6-32 UNC applications. Fits standard tap holders and collets sized for a 0.194-inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or maintenance mechanic familiar with thread insert tapping procedures. Secure the workpiece and ensure proper alignment before beginning the tap; misalignment will damage the tap or produce an off-axis thread. Use appropriate cutting fluid for the workpiece material to extend tap life and improve thread finish. Follow the thread insert manufacturer's specified drill size for the STI tap before tapping.