Meet the Wiseman Threading Tools taper lead metric HSS tap in M18x1.5 with a left-hand thread—a precision solution for reverse-threaded assemblies and challenging fabrication tasks. Built for reliability in everyday metalworking, this uncoated, ground tap delivers predictable cutting action and durable performance across a range of materials.

• Material and finish: High-speed steel (HSS) ground to tight tolerances, uncoated to maximize compatibility with cutting fluids and chip evacuation during heavy tapping.
• Thread and standards: Left-hand thread with a metric M18x1.5 pitch, engineered to ISO 529 dimensions for consistent results with standard tooling sets.
• Lead design: Taper lead provides a gradual thread engagement, making starting the cut easier and reducing the risk of cross-threading in tougher metals.
• General purpose performance: A versatile tool suited for everyday threading tasks in steel, cast iron, and nonferrous materials where a reverse-thread option is required.
• Practical usage: Ideal for repair work, fixture fabrication, or custom component manufacture where left-handed threads are specified. Pair with the appropriate drill size per ISO tapping guidelines for accurate hole preparation.

Why this Wiseman taper lead tap stands out: the combination of taper lead cutting action with a robust HSS core delivers smoother starts, cleaner thread profiles, and longer tool life in a single, purpose-built tap. The left-hand orientation expands your capabilities for reverse-thread assemblies without compromising precision or control.

Ideal for professional shops and serious DIYers alike, this tap is ready to tackle metric threading tasks with confidence. For best results, use a proper tapping fluid, stabilize the workpiece, and maintain steady, moderate pressure through each full rotation to achieve clean, accurate M18x1.5 threads every time.