The Hertel Spiral Flute Tap is a precision threading tool designed for creating #4-40 UNC threads with exceptional accuracy. This 2-flute bottoming tap features a 2B/3B class of fit, providing the perfect balance between precision and ease of use in threading applications. Crafted from high-quality high-speed steel with a bright/uncoated finish, this tap delivers reliable performance and durability for professional and industrial use. The spiral flute design efficiently channels chips away from the cutting edge, reducing clogging and improving thread quality. With a 1-7/8" overall length and right-hand configuration for both flute and thread, this tap is ideal for creating threads in blind holes where maximum thread depth is required. The bottoming chamfer design allows for threading closer to the bottom of the hole compared to standard taps. Perfect for precision machining operations where thread integrity is critical.