OSG Screw Thread Insert STI Tap: Spiral Fute, 3/4"-16 UNF, H4 / 2B-3B, 4 Flute
The OSG Screw Thread Insert STI Tap (SKU 3G-OTH-273377, MPN 10801900) is a spiral-flute tap for 3/4"-16 UNF threads, featuring a bottoming chamfer and 4 flutes. It is ground to an H4 / 2B-3B tolerance class, ensuring…
SKU 3G-OTH-273377
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
Need installation or engineering help?
Ask a question
Product Description
The OSG Screw Thread Insert STI Tap (SKU 3G-OTH-273377, MPN 10801900) is a spiral-flute tap for 3/4"-16 UNF threads, featuring a bottoming chamfer and 4 flutes. It is ground to an H4 / 2B-3B tolerance class, ensuring precise thread fit for STI inserts.
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 a workpiece to accept a helical coil thread insert. It is used in industrial maintenance and production applications where a stripped or worn thread must be restored or reinforced, particularly in softer materials like aluminum.
What are the specifications of the OSG 3/4"-16 UNF STI Tap?
This OSG STI tap has a 3/4"-16 UNF thread, H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. It is a spiral-flute design for chip evacuation in blind holes. The manufacturer part number is 10801900.
Where to buy OSG STI Taps worldwide?
3G Electric supplies OSG STI Taps worldwide. We source genuine industrial tooling across 14 departments and handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on the OSG 3/4"-16 UNF spiral-flute tap.
How to select the correct STI tap size for a thread repair?
Select an STI tap that matches the original thread size and pitch, such as 3/4"-16 UNF. The tap must be marked for screw thread insert use (STI). Use a bottoming chamfer for blind holes and a spiral flute for chip clearance. Always verify the insert manufacturer's recommended drill size.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute sti taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
