Spiral Flute Tap: 5/16-18 UNC, 3 Flutes, Bottoming, 3B Class of Fit, High Speed Steel, Oxide Coated MPN:5390235

These spiral flute taps measure at 5/16-18 UNC in size while featuring 3 flutes to provide clean thread cutting, the type of thread produced is a bottoming chamfer that finishes threads effectively. Made with high-speed steel that makes them ideal for use on hard or soft materials they're perfect when needing top-quality threads, capable of preventing chatter marks to produce the smoothest finish possible. A go-to option for those within the automotive and aerospace sectors, who require durability as well as precision, these taps conform to the 3B class of fit meaning accuracy is paramount when working on intricate mechanisms which rely on flawless threads hence why they're so widely used across multiple industries to provide consistent threading results every time.