The Hertel Extension Tap is a precision threading tool designed for creating accurate 5/8-18 UNF threads. Featuring 3 flutes and an H3 design, this high-speed steel tap delivers consistent performance for professional applications. The spiral point design efficiently pushes chips forward, making it ideal for through holes. With a bright/uncoated finish and 6" overall length, this plug chamfer tap provides excellent visibility and reach for deep threading operations. Manufactured to a 3B class of fit, it ensures threads with proper clearance for smooth assembly. This extension tap is perfect for maintenance professionals, machinists, and industrial applications where precise threading is essential. The durable construction guarantees reliable performance across multiple threading operations, making it a valuable addition to any professional toolbox.