Osg 1714101 Spiral Flute Sti Tap 10-32 Unf Vanadium Hss

Product Description

The OSG 1714101 is a spiral flute STI (Screw Thread Insert) tap designed for threading operations that require the formation of oversized threads to accept helical wire inserts. Built from vanadium high-speed steel with a steam oxide finish, this tap delivers solid wear resistance and lubricity in demanding tapping applications. It features a 45-degree helix angle that promotes chip evacuation up and away from the cutting zone, and a modified bottoming chamfer for threading closer to the bottom of blind holes. The overall length is 2-3/8 inches with a 7/8-inch thread length, making it suited for shallow-to-moderate depth STI thread profiles in a variety of base materials.

This tap is intended for use in machine shop, manufacturing, and maintenance environments where standard threads are being converted to accept threaded inserts for added thread strength or repair. It cuts 10-32 UNF threads at an H2 thread limit, right-hand flute direction, and is rated for use in carbon steel, hardened steel, and stainless steel. The spiral flute geometry makes it well suited for through-hole and short blind-hole tapping on CNC machines, drill presses, or tapping heads where consistent chip flow is required.

Key Features

• Vanadium high-speed steel construction for extended tool life in tough materials
• 45-degree helix angle promotes upward chip evacuation, reducing chip packing in blind holes
• Modified bottoming chamfer allows threading closer to the bottom of the hole compared to standard taper chamfer
• Steam oxide finish improves lubricity and initial wear resistance
• H2 thread limit for close tolerance STI thread production
• Right-hand flute and right-hand cut for standard machine tapping setups

Compatibility

Designed for use in materials including carbon steel, hardened steel, and stainless steel. Produces 10-32 UNF STI oversized threads intended to accept standard helical wire thread inserts. Compatible with conventional tapping chucks and CNC rigid tapping setups accepting the 0.194-inch shank diameter.

Installation Notes

STI taps should be installed by machinists or tooling professionals familiar with thread insert systems and proper tap alignment. Always ensure the workpiece is securely fixtured and the spindle is running at the appropriate speed for the material being tapped. Power down or deactivate the machine fully before changing or inspecting the tap. Follow the tap manufacturer and machine builder recommendations for cutting fluid selection, especially when tapping stainless steel or hardened materials.