Wiseman Threading Tools Spiral Flute Metric HSS Tap Left Hand - M16x2 is a precision ground, high-speed steel tap designed for accurate internal threading in metalworking projects. Uncoated and general purpose, this tap follows ISO 529 dimensions and features a left-hand thread with a spiral flute for efficient chip evacuation.

• Material and finish: High-speed steel (HSS) with a precision-ground thread profile for consistent, repeatable threads. Uncoated construction provides versatile performance across a range of metals and machining setups.
• Flute geometry: Spiral flute design enhances chip removal and reduces packing in deep holes, minimizing heat buildup and easing retraction for smoother tapping in longer threads.
• Thread type and size: Left-hand thread in metric form, M16x2, ideal for applications requiring reverse-thread features or components that require opposite-rotation fastening.
• Standards: Conforms to ISO 529 dimensions, ensuring compatibility with standard metric taps and predictable thread form across compatible tooling and parts.
• Best-use scenarios: Perfect for internal threading in steel, cast iron, and select aluminum workpieces where a left-handed thread is required—whether in repair work, reverse-rotation assemblies, or specialty mechanical builds.

Tips for optimal results: Use a proper pilot hole matched to the M16x2 thread spec, apply a suitable threading fluid or cutting oil, and maintain steady, clean feeds. For left-hand threads, turn the tap counterclockwise to cut threads and to back out smoothly, clearing chips as you progress. Keep the tap aligned to the hole to prevent thread distortion, and back off periodically to break and clear long chip runs.

This tapping tool is an essential addition for the machinist’s kit, delivering reliable, repeatable left-handed threads with a robust HSS core and a geometry designed to maximize longevity and performance in a range of metalworking contexts.