Wiseman Threading Tools Second Lead Metric HSS Tap Left Hand - M10x1.25

When precision matters, you need a tapping tool that can keep up. The Wiseman Threading Tools Second Lead Metric HSS Tap Left Hand - M10x1.25 is a high-speed steel, ground-thread tap designed for reliable, metric left-handed threading in metalworking operations. With ISO 529 dimensions and an uncoated finish, this tap strikes a balance between strength, versatility, and straightforward maintenance for general-tapping tasks.

Why this tap stands out

• Left-hand thread capability: Perfect for applications where the screw or fastener runs counter to the norm, enabling clean, secure left-handed threads without adapters or workarounds.
• Second lead design: A multi-start configuration that advances more quickly per revolution, reducing cycle time on through-holes while maintaining thread integrity.
• HSS, ground for precision: High-speed steel provides solid wear resistance and accurate thread profiles, enabling consistent results across multiple taps.
• Uncoated for general purpose use: A straightforward finish that’s easy to maintain, sharpen, and reuse across a range of standard metalworking jobs.
• Metric M10x1.25, ISO 529 compliant: Ready for common metric threading tasks in steel, aluminum, and other machinable materials, with standard industry geometry.

What makes it uniquely effective

This tap isn’t a one-size-fits-all tool—it’s purpose-built for dependable left-handed threading with efficient cutting action. The second-lead geometry accelerates material removal without sacrificing thread quality, making it well-suited for production environments or workshop projects where speed and consistency matter. The combination of ISO 529 compliance and precise ground geometry translates to predictable results, fewer reworks, and a smoother tapping experience—from pilot hole to final thread.

Ideal use cases

• Fabricating or repairing components that require left-handed threads in metric sizes, such as assemblies in aerospace, automotive, or machinery applications.
• Through-holes and select blind-hole tasks where faster multi-start tapping improves workflow without compromising thread accuracy.
• General-purpose metalworking projects in steel, cast iron, and compatible non-ferrous materials where a reliable M10x1.25 left-hand thread is required.

How to use and care for the tap

• Lubricate with a suitable cutting fluid to reduce friction and extend tool life.
• Ensure the workpiece is properly secured and the tap is aligned with the hole to prevent cross-threading.
• Start the tapping motion by hand or with a tapping machine, applying steady pressure while maintaining perpendicular alignment.
• Tap gradually to the required depth, then back out slowly to clear chips and prevent binding.
• After use, clean residue, wipe dry, and store in a protective holder to preserve edge precision for future jobs.

Specifications at a glance

• Product type: Threading tap
• Material: High Speed Steel (HSS)
• Finish: Uncoated, ground
• Thread direction: Left-hand
• Lead: Second lead (multi-start)
• Size: M10 x 1.25
• Standards: ISO 529

Whether you’re setting up a new left-handed fastener installation or refreshing a worn thread, this Wiseman tap delivers consistent results with every pass. Built for reliability in everyday machining and fabrication tasks, it helps you complete projects faster without sacrificing accuracy.