OSG Spiral Flute Tap: #4-40 UNC, H2 / 2B-3B, 2 Flute
SKU 3G-OTH-230665
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Frequently Asked Questions
What is the OSG spiral flute tap #4-40 UNC used for?
The OSG spiral flute tap #4-40 UNC is designed for threading blind holes in ferrous and non-ferrous materials. Its spiral flute design lifts chips upward, preventing clogging in deep holes. It is commonly used in automotive, aerospace, and general manufacturing applications where precise internal threads are required.
What are the specifications of the OSG spiral flute tap #4-40 UNC?
The OSG spiral flute tap #4-40 UNC has a thread size of #4-40 UNC, a H2 / 2B-3B tolerance class, 2 flutes, and a bottoming chamfer. The manufacturer part number is 1406508. It is designed for general purpose threading in blind holes, providing chip evacuation and thread accuracy.
Where to buy OSG spiral flute taps in worldwide?
You can source OSG spiral flute 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 times on the OSG #4-40 UNC spiral flute tap (MPN 1406508).
How to select the correct OSG spiral flute tap for blind holes?
To select the correct OSG spiral flute tap for blind holes, match the thread size (e.g., #4-40 UNC), tolerance class (H2 / 2B-3B), and chamfer type (bottoming for full threads to the bottom). Ensure the tap material suits your workpiece. OSG taps are designed for chip evacuation in blind holes, reducing breakage risk.
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3G Electric supplies OSG general purpose spiral-flute taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















