OSG Screw Thread Insert STI Tap: Spiral Fute, 1/2"-20 UNF, H4 / 2B-3B
SKU 3G-OTH-276708
Need installation or engineering help?
Ask a question
Frequently Asked Questions
What is the OSG Screw Thread Insert STI Tap used for?
This OSG spiral-flute STI tap is designed for threading holes in nickel and titanium alloys before installing screw thread inserts. It is commonly used in aerospace, automotive, and industrial applications requiring strong, wear-resistant threads in hard materials.
What are the specifications of the OSG 31521008 STI Tap?
The OSG 31521008 is a spiral-flute STI tap with a 1/2"-20 UNF thread size, H4 / 2B-3B tolerance, and 3 flutes. It is engineered for threading in nickel and titanium alloys, ensuring precise fit for screw thread inserts.
Where to buy OSG STI Taps worldwide?
3G Electric supplies OSG STI taps worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG 31521008.
How to select the correct OSG STI Tap for nickel alloys?
Select an OSG STI tap with spiral-flute geometry for nickel and titanium alloys, as it improves chip evacuation. Match the thread size (e.g., 1/2"-20 UNF) and tolerance (H4 / 2B-3B) to your insert requirements. Consult OSG's technical data for material-specific speeds and feeds.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute sti taps for nickel & titanium. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















