OSG Screw Thread Insert STI Tap: Spiral Point, 3/4"-16 UNF, H3 / 2B-3B, 4 Flute
The OSG Screw Thread Insert STI Tap is a spiral-point tap designed for threading multiple materials, featuring a 3/4"-16 UNF thread size, H3 / 2B-3B tolerance, 4-flute design, and plug chamfer (MPN 31403408).
SKU 3G-OTH-284638
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 designed for threading multiple materials, featuring a 3/4"-16 UNF thread size, H3 / 2B-3B tolerance, 4-flute design, and plug chamfer (MPN 31403408).
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 industrial maintenance to repair or reinforce tapped holes in aluminum, steel, and cast iron.
What are the specifications of the OSG STI Tap 3/4-16 UNF?
This OSG STI Tap has a 3/4-16 UNF thread size, H3 / 2B-3B tolerance, 4 flutes, and a plug chamfer. It is a spiral-point design for through-hole tapping. The manufacturer part number is 31403408.
Where to buy OSG STI Tap 31403408 worldwide?
3G Electric supplies the OSG STI Tap 31403408 to worldwide customers. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this spiral-point tap for multiple materials.
How to select the correct STI tap size for a thread insert?
Select an STI tap that matches the thread insert's nominal size and pitch, such as 3/4-16 UNF. The tap tolerance (e.g., H3 / 2B-3B) must align with the insert manufacturer's recommendation. Always verify the tap's chamfer type—plug for general use—and flute count for chip evacuation.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-point sti taps for multiple materials. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
