OSG Spiral Flute Tap: 1/2"-20 UNF, H5 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0138908)
SKU 3G-OTH-217875
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Frequently Asked Questions
What is the OSG spiral flute tap 0138908 used for?
The OSG spiral flute tap 0138908 is designed for threading blind holes in steel and stainless steel. Its spiral flute design evacuates chips upward, preventing clogging and ensuring clean threads. It is commonly used in automotive, aerospace, and general manufacturing applications.
What are the specifications of the OSG spiral flute tap 0138908?
The OSG spiral flute tap 0138908 has a thread size of 1/2"-20 UNF, with an H5 tolerance class for 2B-3B fit. It features 3 flutes and a bottoming chamfer for threading to the bottom of blind holes. The manufacturer part number is 0138908.
Where to buy the OSG spiral flute tap 0138908 worldwide?
You can source the OSG spiral flute tap 0138908 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time.
How to select the correct OSG spiral flute tap for steel?
For steel and stainless steel, choose a spiral flute tap with a bottoming chamfer for blind holes. The OSG 0138908 with 1/2"-20 UNF thread and H5 tolerance is suitable for precise threading. Ensure the tap matches the material hardness and hole depth for optimal performance.
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3G Electric supplies OSG spiral-flute taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















