OSG Screw Thread Insert STI Tap: Straight Fute, 9/16"-18 UNF, H4 / 2B-3B, 4 Flute
SKU 3G-OTH-262084
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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 pre-drilled hole to accept a helical wire thread insert. It is used in industrial maintenance and production to repair or reinforce stripped threads in metals and alloys, restoring fastener integrity without replacing the parent component.
What are the specifications of the OSG STI Tap 12602100?
The OSG STI Tap 12602100 is a 9/16"-18 UNF straight flute tap with a plug chamfer and 4 flutes. It is ground to H4 / 2B-3B tolerance, making it suitable for producing threads that accept screw thread inserts in general-purpose applications across multiple materials.
Where to buy OSG STI Tap 12602100 worldwide?
3G Electric supplies the OSG STI Tap 12602100 to customers worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote and lead time on this general-purpose STI 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—here 9/16"-18 UNF—and the required thread class (H4 / 2B-3B). The tap must be used with the corresponding screw thread insert. Always drill the recommended hole diameter for the insert before tapping.
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Common applications for OSGOSG Products
3G Electric supplies OSG general purpose sti taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















