These taps are designed for machine tapping in a wide rane of material groups, including difficult to machine materials such as stainless steel. The Nitro™ multi-application tap improves thread quality, and aids in chip evacuation, eliminating bird nesting. They are available in both spiral point and spiral flute designs, in fractional and metric sizes. 5/16-18, multi-application spiral flute taps, high speed steel, bright