OSG Spiral Flute Tap: 7/16"-20 UNF, 2B, 3 Flute, Bottoming Chamfer
The OSG Spiral Flute Tap (7/16"-20 UNF, MPN 2987001) is a general-purpose tap with a 2B thread class, bottoming chamfer, and black oxide high-speed steel construction. It features 3 flutes for efficient chip…
SKU 3G-OTH-230874
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Product Description
The OSG Spiral Flute Tap (7/16"-20 UNF, MPN 2987001) is a general-purpose tap with a 2B thread class, bottoming chamfer, and black oxide high-speed steel construction. It features 3 flutes for efficient chip evacuation in through-hole threading applications.
Frequently Asked Questions
What is the OSG spiral flute tap 7/16"-20 UNF used for?
This OSG spiral flute tap is designed for threading blind holes in materials like steel and aluminum. Its 3-flute design and bottoming chamfer allow chip evacuation upward, making it ideal for automotive, aerospace, and general manufacturing applications where precise internal threads are required.
What are the specifications of the OSG spiral flute tap 7/16"-20 UNF?
The OSG spiral flute tap has a 7/16"-20 UNF thread size, 2B class of fit, 3 flutes, and a bottoming chamfer. It is made from black oxide high-speed steel (HSS) and carries manufacturer part number 2987001. This tap is suitable for threading blind holes in various materials.
Where to buy the OSG spiral flute tap 7/16"-20 UNF worldwide?
You can source the OSG spiral flute tap 7/16"-20 UNF from 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 on this OSG tap.
How to select the correct OSG spiral flute tap for blind holes?
For blind holes, choose a spiral flute tap with a bottoming chamfer, like this OSG 7/16"-20 UNF model. The spiral flutes push chips upward, preventing clogging. Ensure the tap matches the thread size, pitch, and material hardness. Use proper cutting fluid and follow manufacturer speed recommendations for best results.
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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.















