Wiseman Threading Tools Bottom Lead Metric HSS Tap Left Hand - M9x1.25

Precision meets practicality in this high-speed steel (HSS) ground tap. Uncoated for broad material compatibility, it’s designed to cut clean, accurate M9x1.25 threads with a left-hand pitch. The ISO 529 dimensions ensure reliable performance across standard metric workpieces, making it a dependable choice for both professional shops and dedicated hobbyists.

The bottom lead design and robust geometry provide smooth entry and steady thread formation, helping you achieve consistent results in through-holes and blind-holes alike. Its left-hand thread is ideal for applications that require reverse-turn tightening or special fastener configurations, giving you versatility in demanding assemblies.

Why this left-hand M9x1.25 HSS tap stands out

• Left-hand metric threading—cuts reverse threads with precision, enabling specialized assemblies without swapping tools.
• M9x1.25 pitch—fits common metric components and hardware that rely on this exact specification.
• ISO 529 compliant—ensures compatibility with standard metric hole sizes and threading practice.
• Bottom lead geometry—designed for controlled entry and steady chip formation to deliver reliable cuts project after project.
• High-speed steel, uncoated—versatile across a range of metals; easy to sharpen and re-tap as needed.
• General purpose tool—perfect for maintenance, repair, and fabrication tasks in workshops, garages, or production floors.

Ideal use cases

• Repairing or creating left-handed threaded connections in steel, aluminum, brass, and similar materials.
• Setting up reverse-thread fasteners or components that require opposite-turn tightness.
• Maintenance and fabrication tasks where a reliable, general-purpose taps performs best without coated options.

Practical tips for the best results

• Use a suitable cutting fluid or oil to minimize friction and extend tap life.
• Start with a pilot hole sized to standard tapping practice for M9x1.25, and advance with steady, even pressure.
• Back off occasionally to break chips and prevent binding; keep the workpiece well-supported and aligned.
• Clean the threads after tapping and inspect for cracks or misalignment before assembly.

For a clear, detailed view of the tool’s geometry, refer to the included Wiseman image that highlights the precise left-hand thread and bottom lead features.