OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-11 UNC, H3 / 2B-3B
SKU 3G-OTH-281083
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 5/8"-11 UNC?
This OSG spiral-flute STI tap has a 5/8"-11 UNC thread size, H3 / 2B-3B tolerance, and 4 flutes. The spiral flute design helps evacuate chips upward, making it suitable for blind-hole threading in multiple materials. Manufacturer part number is 31502808.
Where to buy OSG STI Taps in worldwide?
3G Electric supplies and delivers OSG STI Taps worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to ensure your order arrives at your facility, wherever it is located. Contact us for availability and lead time.
How to select the correct OSG STI Tap for a repair job?
Select an OSG STI Tap based on the thread size and pitch of the insert you will install. For blind holes, choose a spiral-flute design like this 5/8"-11 UNC tap. Match the tap tolerance (H3 / 2B-3B) to your required thread class. Always use proper tapping fluid for the workpiece material.
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.















