OSG Screw Thread Insert STI Tap: Spiral Point, 7/16"-20 UNF, H4 / 2B-3B, 3 Flute
The OSG Screw Thread Insert STI Tap is a spiral-point tap for nickel and titanium, sized 7/16"-20 UNF with an H4 / 2B-3B tolerance and plug chamfer. It features 3 flutes and is identified by MPN 31440908.
SKU 3G-OTH-279742
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
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Product Description
The OSG Screw Thread Insert STI Tap is a spiral-point tap for nickel and titanium, sized 7/16"-20 UNF with an H4 / 2B-3B tolerance and plug chamfer. It features 3 flutes and is identified by MPN 31440908.
Frequently Asked Questions
What is an OSG Screw Thread Insert STI Tap used for?
This OSG spiral-point STI tap cuts internal threads in nickel and titanium alloys for screw thread inserts. It creates the oversized hole needed for helical coil inserts, restoring or strengthening threads in high-stress aerospace, automotive, and industrial applications.
What are the specifications of the OSG 31440908 STI Tap?
The OSG 31440908 is a 7/16"-20 UNF spiral-point STI tap with H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is designed specifically for threading nickel and titanium alloys where thread insert installation requires precise oversized tapping.
Where to buy OSG STI Taps for nickel and titanium worldwide?
3G Electric supplies OSG STI taps like the 31440908 to global customers. We handle full logistics, customs clearance, and delivery worldwide. Contact us for pricing and lead time on this spiral-point tap for thread insert work in nickel and titanium.
How to select the correct STI tap for thread inserts?
Select an STI tap based on the insert's thread size and pitch—here 7/16"-20 UNF. Use a plug chamfer for through holes or blind holes with sufficient depth. The H4 / 2B-3B tolerance ensures the tapped hole matches the insert's external thread class. OSG taps are engineered for nickel and titanium alloys.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-point sti taps for nickel & titanium. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
