Wiseman Threading Tools Second Lead Metric HSS Tap Left Hand - M30x3.5 is a precision ground, high-speed steel threading tap designed for reliable left-handed thread formation in metric components. This uncoated HSS tap delivers steady performance across general purpose applications while meeting ISO 529 dimensions for consistent results.

Key design features that set this tap apart:

• Material and finish: High-speed steel ground for strength and accuracy; uncoated surface promotes predictable cutting action and easy chip clearance in a variety of materials.
• Threading specification: Metric thread profile following ISO 529, with a left-hand orientation to cut reverse threads, ideal for components that rotate in the opposite direction or require reverse fastener engagement.
• Second lead: Optimized lead geometry to improve cutting speed and reduce torque, enabling smoother operation in deep or challenging holes while helping to evacuate chips more effectively.
• Size and compatibility: M30x3.5 size provides a precise metric coarse-to-medium pitch appropriate for larger assemblies. Designed to work with standard tapping setups that accept metric, left-hand plugs and taps—the included USA plug lead option supports common workshop configurations.

Why you’ll value this Wiseman tap in real-world work:

• Efficiency in demanding jobs: The second-lead geometry reduces cutting resistance and speeds up thread formation on thick-walled or tough materials, saving time on each hole.
• Dependable left-hand threading: When a left-handed connection is required—such as reverse-threaded fasteners or assemblies with rotational dynamics—the tap delivers clean, accurate threads that won’t back out under load.
• Reliability across general-purpose tasks: With ISO 529 conformity and robust HSS construction, this tap suits repair work, machinery maintenance, and fabricating metric components where strong, repeatable threads matter.
• Versatility for workshops: A single tool that handles a broad range of left-hand threading tasks, reducing the need for multiple right-hand/left-hand configurations and providing consistent results across different materials.

Practical guidance for best results:

• Use appropriate lubrication to minimize heat buildup and extend tool life during threading.
• Ensure the workpiece is properly aligned and clamped; begin with a chamfered entry to guide the tap cleanly into the hole.
• Choose the correct tapping speed and backing off periodically to break chips for smoother completion of the thread.
• Match the tap to a compatible drill size and ensure ISO 529 dimension accuracy to achieve a precise M30x3.5 thread.

Whether you’re fabricating metric components, performing maintenance on machinery, or repairing left-hand threaded assemblies, the Wiseman Threading Tools Second Lead Metric HSS Tap Left Hand - M30x3.5 is built to deliver dependable performance, repeatable results, and a professional finish every time.