OSG Screw Thread Insert STI Tap: Spiral Fute, 3/8"-24 UNF, H2 / 2B-3B
SKU 3G-OTH-281158
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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 multiple materials to accept helical wire thread inserts. It is commonly used in aerospace, automotive, and general manufacturing to repair or reinforce tapped holes in aluminum, steel, and cast iron.
What are the specifications of the OSG 31501401 STI Tap?
The OSG 31501401 is a spiral-flute STI tap with a 3/8"-24 UNF thread, H2 / 2B-3B tolerance, and 3 flutes. It is designed for tapping holes that will receive screw thread inserts, providing accurate thread class control in multiple materials.
Where to buy OSG STI Taps worldwide?
3G Electric supplies OSG STI Taps worldwide, handling full logistics and customs clearance. As a global industrial sourcing partner, we provide genuine OSG cutting tools like the 31501401 to customers across 14 departments, including machining and tooling.
How to select the correct OSG STI Tap size?
Select an OSG STI Tap based on the thread size and pitch of the insert you plan to install. For example, the 31501401 matches a 3/8"-24 UNF insert. Always verify the tap's H tolerance and flute style match your material and thread class requirements.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute sti taps for multiple materials. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















