OSG Spiral Flute Tap: 1/4"-28 UNF, 2B, 3 Flute, Bottoming Chamfer
The OSG Spiral Flute Tap (1/4"-28 UNF, MPN 2985701) is a general-purpose spiral-flute tap with a 2B thread class, bottoming chamfer, and black oxide high-speed steel construction. It features 3 flutes for efficient…
SKU 3G-OTH-229888
Need installation or engineering help?
Ask a question
Product Description
The OSG Spiral Flute Tap (1/4"-28 UNF, MPN 2985701) is a general-purpose spiral-flute 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 2985701 used for?
The OSG spiral flute tap 2985701 is used for threading blind holes in materials like steel and aluminum. Its spiral flute design evacuates chips upward, preventing clogging. It is ideal for automotive, aerospace, and general manufacturing applications requiring precise internal threads.
What are the specifications of the OSG spiral flute tap 2985701?
The OSG spiral flute tap 2985701 has a 1/4\"-28 UNF thread size, 2B class fit, 3 flutes, and a bottoming chamfer. It is made of black oxide high-speed steel (HSS) for wear resistance. The manufacturer part number is 2985701.
Where to buy the OSG spiral flute tap 2985701 worldwide?
You can source the OSG spiral flute tap 2985701 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 blind holes?
For blind holes, choose a spiral flute tap like the OSG 2985701 with a bottoming chamfer to thread near the hole bottom. Ensure the tap matches the thread size (1/4\"-28 UNF) and material (black oxide HSS for general use). Use proper cutting fluid and speed for best results.
Used in
Common applications for OSGOSG Products
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.














