OSG Screw Thread Insert STI Tap: Spiral Fute, 3/8"-16 UNC, H3 / 2B-3B
SKU 3G-OTH-281126
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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 aerospace, automotive, and general manufacturing where strong, wear-resistant threads are required in softer base materials.
What are the specifications of the OSG 31501208 STI Tap?
The OSG 31501208 is a spiral-flute STI tap with thread size 3/8"-16 UNC, tolerance H3 / 2B-3B, and 3 flutes. It is designed for threading multiple materials to accept screw thread inserts. The spiral flute design aids chip evacuation in blind-hole applications.
Where to buy OSG STI taps in 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 31501208 spiral-flute STI tap.
How to select the correct OSG STI tap for a thread insert?
Select an OSG STI tap based on the thread size and pitch of the insert, such as 3/8"-16 UNC. Ensure the tap tolerance (e.g., H3 / 2B-3B) matches the required class of fit. For blind holes, choose a spiral-flute design like this OSG tap for effective chip removal.
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.















