OSG Screw Thread Insert STI Tap: Straight Fute, 5/16"-18 UNC, H3 / 2B-3B, 4 Flute
SKU 3G-OTH-261978
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Frequently Asked Questions
What is an OSG Screw Thread Insert STI Tap used for?
An OSG STI tap cuts internal threads in a pre-drilled hole to accept a screw thread insert (Heli-Coil type). It is used in industrial maintenance and production to repair stripped threads or strengthen threads in softer materials like aluminum, across machining and repair applications.
What are the specifications of the OSG 1812400 STI Tap?
The OSG 1812400 is a 5/16"-18 UNC STI tap with a H3 / 2B-3B tolerance, 4 flutes, and a plug chamfer. It is a straight flute, general-purpose tap designed for threading holes that will receive a screw thread insert. 3G Electric supplies this genuine OSG part worldwide.
Where to buy OSG STI Tap 1812400 worldwide?
3G Electric supplies the OSG 1812400 STI tap to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote and lead time; we source genuine OSG tooling for industrial maintenance and production needs globally.
How to select the correct STI tap size for a thread repair?
Select an STI tap that matches the original thread size and pitch (e.g., 5/16"-18 UNC) and the required thread class (H3 / 2B-3B). The tap diameter is larger than a standard tap to accommodate the insert. Always verify the insert manufacturer's drill and tap specifications before ordering.
Used in
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.
