OSG Extension Tap: #4-40 UNC, H2 / 2B-3B, 3 Flute
SKU 3G-OTH-315309
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Frequently Asked Questions
What is an OSG extension tap used for?
An OSG extension tap is used to thread deep or hard-to-reach holes in steel and stainless steel. Its extended reach and spiral-flute design efficiently evacuate chips, making it ideal for automotive, aerospace, and general machining applications where standard taps cannot access the workpiece.
What are the specifications of the OSG extension tap #4-40 UNC?
This OSG extension tap is #4-40 UNC with a H2 / 2B-3B thread limit, 3 flutes, and a modified bottoming chamfer. It is designed for steel and stainless steel. The manufacturer part number is 1766101. These specs ensure precise threading in demanding materials.
Where to buy OSG extension taps worldwide?
3G Electric supplies OSG extension taps worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this #4-40 UNC tap to your facility. Contact us for availability and lead time on this and other OSG tooling.
How to select the right OSG extension tap for steel?
Select an OSG extension tap based on thread size, material, and hole depth. For steel and stainless steel, use a spiral-flute design like this #4-40 UNC tap with a modified bottoming chamfer. Match the H2 / 2B-3B tolerance to your required thread class for optimal fit and performance.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute extension taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
