OSG Screw Thread Insert STI Tap: Spiral Fute, 7/16"-20 UNF, H4 / 2B-3B
SKU 3G-OTH-262344
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 aluminum that will receive screw thread inserts. It is commonly used in aerospace, automotive, and general manufacturing where reliable, high-tolerance threads are required in softer materials.
What are the specifications of the OSG 1303901200 STI tap?
The OSG 1303901200 is a spiral-flute STI tap with a 7/16"-20 UNF thread, H4 / 2B-3B tolerance, and 2 flutes. It is designed for threading holes in aluminum before installing screw thread inserts. The H4 tolerance ensures proper fit for the insert.
Where to buy OSG STI taps in worldwide?
You can source the OSG 1303901200 STI tap through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this OSG tap.
How to select the correct STI tap for aluminum?
Select an STI tap with the same thread size and pitch as the insert you plan to use. For aluminum, choose a spiral-flute design like this OSG tap to clear chips effectively. The H4 tolerance ensures the tapped hole matches the insert's external thread class.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute sti taps for aluminum. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















