OSG STRAIGHT FLUTE Tap: 1/4"-20 UNC, H5 / 2B-3B, 3 Flute, Bottoming Chamfer, Carbide (MPN 1661500400)
The OSG STRAIGHT FLUTE Tap is a coolant-through straight-flute machine tap for aluminum, sized 1/4"-20 UNC. It features a carbide construction with H5 / 2B-3B tolerance, a bottoming chamfer, and 3 flutes (MPN…
SKU 3G-OTH-207629
Need installation or engineering help?
Ask a question
Product Description
The OSG STRAIGHT FLUTE Tap is a coolant-through straight-flute machine tap for aluminum, sized 1/4"-20 UNC. It features a carbide construction with H5 / 2B-3B tolerance, a bottoming chamfer, and 3 flutes (MPN 1661500400).
Frequently Asked Questions
What is the OSG straight flute tap used for?
This OSG straight flute tap is designed for threading aluminum and non-ferrous materials in CNC machining. Its coolant-through design flushes chips and reduces heat, making it ideal for high-speed production tapping in automotive, aerospace, and general manufacturing applications.
What are the specifications of the OSG straight flute tap?
This OSG tap has a 1/4"-20 UNC thread, H5 tolerance for 2B-3B class fit, 3 flutes, and a bottoming chamfer. It is made of carbide with coolant-through capability. The manufacturer part number is 1661500400. It is optimized for tapping aluminum and non-ferrous materials.
Where to buy OSG straight flute taps worldwide?
3G Electric supplies OSG straight flute taps worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time. We source and deliver this tap to any country.
How to select the right OSG straight flute tap for aluminum?
For aluminum, choose a tap with a bottoming chamfer for blind holes or a plug chamfer for through holes. Ensure the thread size matches your application, like 1/4"-20 UNC. Carbide taps with coolant-through, like this OSG model, provide longer tool life and better chip evacuation in production runs.
Used in
Common applications for OSG STRAIGHT FLUTEOSG STRAIGHT FLUTE Products
3G Electric supplies OSG STRAIGHT FLUTE coolant-through straight-flute machine taps for aluminum. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.














