OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H6 / 2B-3B
SKU 3G-OTH-281094
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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 for helical wire thread inserts in multiple materials. It is commonly applied in aerospace, automotive, and general manufacturing where thread repair or reinforcement is needed. The spiral-flute design aids chip evacuation in blind-hole applications.
What are the specifications of the OSG Screw Thread Insert STI Tap?
This OSG STI tap has a 1"-8 UNC thread size, H6 / 2B-3B tolerance, and 4 flutes with a spiral-flute design. The manufacturer part number is 31504101. It is designed for cutting threads in multiple materials and is suitable for use with screw thread inserts.
Where to buy the OSG Screw Thread Insert STI Tap worldwide?
You can source the OSG Screw Thread Insert STI Tap 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 this item.
How to select the correct OSG STI tap for a thread repair job?
To select the correct OSG STI tap, match the tap thread size and pitch to the insert you plan to use. For this 1"-8 UNC tap, ensure the insert is also 1"-8 UNC. The H6 / 2B-3B tolerance indicates the tap produces threads that fit standard 2B or 3B class internal threads. Always verify material compatibility.
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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.















