Introducing the Wiseman Threading Tools Spiral Flute Metric HSS Tap Left Hand - M20x1.5, a precision-ground high-speed steel tap built for reliable left-hand threading in metalworking projects. This uncoated, general-purpose tap adheres to ISO 529 dimensions, delivering dependable metric threads with predictable results.

• Tap type: Spiral flute metric HSS tap designed for efficient chip evacuation and smoother cutting in deeper holes.
• Thread direction: Left-hand thread — rotate in the reverse direction (opposite of standard right-hand taps) to cut and finish left-hand threads.
• Size and standard: M20 x 1.5 with ISO 529 dimensions ensures compatibility with metric hardware and fasteners.
• Material & finish: High-speed steel, uncoated for versatility across ferrous and non-ferrous metals when paired with appropriate cutting fluid.
• General purpose: A dependable choice for repairs, prototyping, and production tasks requiring left-handed threads.

Why choose this Wiseman left-hand tap? It combines robust construction with chip-shedding efficiency typical of spiral flutes, reducing binding and the risk of tap breakage in tougher materials. The uncoated finish keeps cost accessible while remaining compatible with a wide range of lubricants and coolants to extend tool life.

• Create or repair 20 mm left-hand threaded holes in steel, cast iron, brass, and other alloys where the thread tightens counterclockwise.
• Drill the appropriate pilot hole per standard threading charts and maintain steady, aligned entry to avoid wandering.
• Use a stable setup, apply cutting fluid, and turn in the reverse direction for left-hand threads with even, controlled pressure.
• Maintenance: Clear chips regularly, back off if binding occurs, and store the tap clean and dry to preserve its edge.

With the Wiseman Threading Tools Spiral Flute Metric HSS Tap Left Hand - M20x1.5, experienced machinists and hobbyists gain a reliable tool for precise, durable left-handed threading. It’s a practical, highly capable solution for anyone who expects consistent thread quality and smooth operation in demanding materials.