OSG Screw Thread Insert STI Tap: Spiral Fute, 1/2"-13 UNC, H4 / 2B-3B
SKU 3G-OTH-281177
Need installation or engineering help?
Ask a question
Frequently Asked Questions
What is an OSG Screw Thread Insert STI Tap used for?
An OSG Screw Thread Insert STI Tap cuts internal threads in multiple materials to accept helical wire thread inserts. It is commonly used in aerospace, automotive, and general manufacturing to repair or reinforce tapped holes in aluminum, steel, and cast iron.
What are the specifications of the OSG STI Tap 31502101?
The OSG STI Tap 31502101 is a spiral-flute tap with a 1/2"-13 UNC thread size, H4 / 2B-3B tolerance, and 3 flutes. It is designed for threading holes that will receive screw thread inserts in multiple materials.
Where to buy OSG STI Tap 31502101 worldwide?
3G Electric supplies the OSG STI Tap 31502101 to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this spiral-flute tap for thread inserts.
How to select the correct STI tap for thread inserts?
Select an STI tap based on the thread insert's size and tolerance. For a 1/2"-13 UNC insert, use a tap with matching thread pitch and an H4 tolerance for 2B-3B class fit. OSG taps are designed for multiple materials; ensure proper cutting fluid and speed for the workpiece.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute sti taps for multiple materials. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















