OSG Extension Tap: 9/16"-12 UNC, H5 / 2B-3B, 3 Flute
SKU 3G-OTH-311701
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Frequently Asked Questions
What is the OSG Extension Tap 9/16"-12 UNC used for?
This OSG extension tap is designed for threading blind or deep holes in multiple materials. Its spiral-flute design evacuates chips upward, making it ideal for automotive, aerospace, and general manufacturing applications where extended reach is required.
What are the specifications of the OSG Extension Tap 9/16"-12 UNC?
The OSG Extension Tap has a 9/16"-12 UNC thread size, H5 tolerance for 2B-3B class fit, 3 flutes, and a modified bottoming chamfer. The manufacturer part number is 1652503708. It is a spiral-flute extension tap for multiple materials.
Where to buy the OSG Extension Tap 9/16"-12 UNC worldwide?
You can source the OSG Extension Tap 9/16"-12 UNC from 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring you receive the correct OSG tap for your threading needs.
How to select the correct OSG extension tap for deep-hole threading?
Select an OSG extension tap based on thread size, pitch, and hole depth. For 9/16"-12 UNC threads, use a tap with sufficient flute length to clear chips. The spiral-flute design and modified bottoming chamfer help in blind holes. Always match the tap tolerance (H5) to the required thread class (2B-3B).
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute extension taps for multiple materials. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















