Introducing the Wiseman Threading Tools Second Lead Metric HSS Tap, Left Hand - M16x1. This high-speed steel ground thread tap is built for precision and reliability in general-purpose threading tasks. Uncoated for straightforward use, it adheres to ISO 529 dimensions and features a left-hand thread with a second lead design, delivering efficient performance for reverse-thread applications.

Why this Wiseman HSS tap stands out

• Left-hand thread, M16x1 enables you to create reverse-threaded fasteners or assemble components that must resist loosening under vibration.
• Second lead geometry reduces the number of turns needed to reach depth, speeding up tapping in longer holes without sacrificing thread accuracy.
• High-speed steel, ground finish delivers clean, consistent thread profiles and dependable tool life for everyday metalworking tasks.
• Uncoated, general purpose design provides a straightforward, versatile tap that’s easy to sharpen and maintain in a busy shop.
• ISO 529 compliant ensures compatibility with standard metric internal threads and nuts, simplifying part mating and replacement.
• USA plug lead supports reliable engagement and uniform starting behavior in typical workshop setups.

Ideal use cases

Designed for hobbyists and professionals tackling left-hand threading in steel, aluminum, and other common metals. Use it to retrofit machinery, assemble panels with reverse-thread fasteners, or repair assemblies where back-out resistance is essential. This tap excels in general-purpose applications where you need a dependable metric thread and the efficiency of a second-lead design.

Practical tapping guidance

• Choose a drill size appropriate for M16x1 threads per metric tapping charts, then align the tap precisely to avoid cross-threading.
• Apply a suitable cutting fluid or light oil to reduce friction, control heat, and extend tool life.
• When tapping, maintain steady pressure and straight alignment; back out periodically to break chips and prevent binding in longer holes.
• Ensure the workpiece is secure and well-supported to minimize deflection and ensure clean thread formation.

Specifications at a glance

• Tool type: Tap, left-hand, second lead
• Material: High-speed steel (HSS)
• Finish: Uncoated, ground thread
• Thread: M16 x 1 (metric), left-hand
• Standards: ISO 529
• Lead: Second lead (USA plug lead)
• Applications: General-purpose threading in metal, with left-handed thread requirements