OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-14 UNF, H3 / 2B-3B
SKU 3G-OTH-281168
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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, replaceable threads are needed in softer base materials.
What are the specifications of the OSG STI Tap 31503808?
The OSG STI Tap has a 7/8"-14 UNF thread size, H3 / 2B-3B tolerance, and a spiral-flute design with 4 flutes. It is designed for multiple materials and is identified by manufacturer part number 31503808.
Where to buy OSG STI Tap 31503808 worldwide?
You can source the OSG STI Tap 31503808 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring reliable supply for your operations.
How to select the correct OSG STI tap for UNF threads?
Select an OSG STI tap matching the thread size and pitch of your insert, such as 7/8"-14 UNF. Verify the tolerance class (e.g., H3 / 2B-3B) aligns with your required fit. Use a spiral-flute design for chip evacuation in through-hole applications.
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.















