Spiral Flute Tap: #4-40, UNC, 2 Flute, Plug, 2B & 3B Class of Fit, High Speed Steel, Bright/Uncoated MPN:12006-00-B

Spiral flute taps like this #4-40 UNC version are commonly used for threading into steel materials, providing greater efficiency during the tapping process. The bright/uncoated high-speed steel composition ensures superior strength and wear resistance against brittleness while allowing easy tap re-grinding or reusing. It features two flutes, reducing heat build-up in the tool during use and producing smoother cuts with its plug style. Its 2B & 3B class of fit offers better gripping and accuracy, providing more precise thread creation on both soft and hard materials. All these properties contribute to its effectiveness as an essential tool for machinists and engineers in industries ranging from automotive or aerospace, making it worthwhile for professionals invested in quality thread-creation workmanship.