The Hertel Straight Flute Tap is a precision machining tool engineered for creating M20x1.5 metric fine threads in pre-drilled holes. Featuring a 4-flute straight design, this tap provides superior chip evacuation for smooth, efficient threading operations. Constructed from high-quality high-speed steel with a bright/uncoated finish, it delivers exceptional durability and cutting performance in demanding applications. The bottoming chamfer design (D6) allows you to thread closer to the bottom of blind holes, making it ideal for applications where complete thread depth is critical. With a 4-15/32" overall length and right-hand thread direction, this tap is perfectly suited for professional machining operations. Whether you're working in manufacturing, maintenance, or repair settings, this Hertel tap ensures consistent, precise metric threading results across various materials.