Wiseman Threading Tools Second Lead Metric HSS Tap Left Hand - M20x2 is a precision-grade tapping instrument built for challenging threading tasks that demand accuracy and durability. Crafted from high-speed steel and ground to exacting standards, this uncoated tap is designed for general-purpose use with left-hand threads. The ISO 529 dimensions ensure reliable compatibility with your metric threading projects, while the second-lead (double-lead) geometry delivers faster material removal and cleaner thread forms in a variety of metals. Key features that set this tap apart: - Left-hand thread, M20x2: Ideal for reverse-thread applications and installations that require opposite-direction fasteners. - Second lead design: A double-lead setup that reduces tapping time and enhances chip evacuation, making it well-suited for tougher metals and thicker materials. - High-speed steel, ground finish: Delivers precise thread form and longevity with a robust, dependable cutting edge. - Uncoated versatility: Free from coatings that can trap chips or affect cutting dynamics, enabling broad compatibility across different metals and lubrication regimes. - ISO 529 dimensional accuracy: Ensures consistent fit and consistent thread quality across standard workpieces. - Practical, square-drive end: Compatible with standard tapping wrenches and machine tools for secure, controlled operation. Who this is for: - Machinists and technicians tackling left-handed threaded fasteners in repair, maintenance, or production environments. - Hobbyists and enthusiasts working with metal parts that require reverse-threading solutions. - Shops seeking a reliable, all-purpose left-hand tap that performs well across steel, aluminum, brass, and other common metals. Why it matters: - Time-saving performance: The second-lead geometry cuts more material per rotation, speeding up production without sacrificing thread integrity. - Cleaner threads: Ground cutting edges produce consistent thread profiles, improving grip and torque transfer in fasteners. - Flexible, general-purpose tool: Uncoated HSS handles a broad range of materials and lubricants, making it a practical addition to any threading toolkit. Practical usage tips: - Use appropriate cutting fluid or light oil to reduce heat and extend tool life. - Align the tap carefully with the hole; start with steady, even pressure and follow the thread pitch to maintain true alignment. - For left-hand threading, rotate the tap counterclockwise to cut the thread and achieve secure engagement with reverse-thread fasteners. - Clear chips frequently to prevent binding and maintain a clean thread surface. - Store in a dry environment to preserve the ground finish and edge geometry. Designed to deliver consistent results, this Wiseman HSS tap is a dependable choice when you need precise M20x2 left-hand threads with dependable performance. Whether you’re refurbishing a machine, assembling reverse-thread components, or fabricating parts with exacting specifications, this tap helps you achieve strong, accurate threads with less effort and greater reliability.