OSG Screw Thread Insert STI Tap: Spiral Fute, 1/4"-20 UNC, H3 / 2B-3B

An OSG Screw Thread Insert STI Tap is used to cut internal threads in steel and stainless steel for installing helical wire thread inserts. It is commonly applied in aerospace, automotive, and industrial maintenance to repair or reinforce threaded holes without replacing larger components.

The OSG 30201108 is a spiral-flute STI tap with thread size 1/4"-20 UNC, H3 / 2B-3B tolerance, and 3 flutes. It is designed for tapping steel and stainless steel. The spiral flute design helps evacuate chips upward, making it suitable for through-hole applications.

You can source OSG STI taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG 30201108 spiral-flute STI tap.

Select an STI tap that matches the thread insert's nominal size and pitch, such as 1/4"-20 UNC. The tap tolerance (e.g., H3 / 2B-3B) must align with the insert's internal thread class. Always refer to the insert manufacturer's recommendations and use a tap designed for the base material, like OSG's spiral-flute taps for steel.