OSG Screw Thread Insert STI Tap: Spiral Fute, 5/16"-18 UNC, H4 / 2B-3B
SKU 3G-OTH-281144
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Frequently Asked Questions
What is the OSG Screw Thread Insert STI Tap used for?
The OSG Screw Thread Insert STI Tap is used to cut internal threads in multiple materials for installing screw thread inserts. It is commonly applied in automotive, aerospace, and general manufacturing where strong, wear-resistant threads are required in softer base materials.
What are the specifications of the OSG 31501008 STI Tap?
The OSG 31501008 is a spiral-flute STI tap with thread size 5/16"-18 UNC, H4 / 2B-3B tolerance, and 3 flutes. It is designed for threading holes that will accept screw thread inserts, providing accurate thread fit in multiple materials.
Where to buy OSG STI Taps worldwide?
You can source OSG STI Taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG 31501008.
How to select the correct OSG STI Tap size?
To select the correct OSG STI Tap, match the thread size and pitch to the insert you plan to install. For example, the 5/16"-18 UNC tap is used with corresponding STI inserts. Verify the required thread class (e.g., H4 / 2B-3B) and material type to ensure proper thread formation.
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.















