Wiseman M12x1.75 Left-Hand Spiral Flute HSS Tap

The Wiseman Threading Tools Spiral Flute Metric HSS Tap in the M12x1.75 size is a precise, high-speed steel ground tap designed for reliable metric threading. Uncoated for efficient cutting action, this tool delivers clean, tight threads in a variety of metals while standing up to repeated use in demanding workshop environments.

• Left-hand thread: Cuts reverse threads that tighten counterclockwise, ideal for components where standard threads might loosen under vibration or rotation.
• Spiral flute: Optimizes chip evacuation and reduces binding, making tapping smoother in through-holes and challenging workpieces.
• Metric precision per ISO 529: Engineered to the ISO standard, ensuring compatibility with standard M12x1.75 fasteners and fittings.
• High-speed steel, ground: A robust, accurate profile with a precise flute geometry that yields consistent thread quality across multiple cuts.
• Uncoated finish: Maximizes cutting efficiency and provides a reliable cutting action when used with appropriate lubrication.

Typical uses: machining and fabrication tasks where a left-hand thread is required to counteract reverse forces, such as securing pulleys, couplings, or fixtures on rotating shafts. This tap excels in aluminum, mild steel, and cast iron workpieces where clean, accurate threads are essential for performance and safety.

Why choose this Wiseman tap? It combines a proven spiral flute design with ISO-compliant dimensions to deliver repeatable threading results, reduced chatter, and longer tool life in busy production or DIY environments. The left-hand orientation provides a practical solution for assemblies that rely on reverse-thread tightening to stay secure under load.

Usage tips:

• Prepare the hole with the recommended tapping drill size per ISO 529 guidelines.
• Apply a light cutting fluid or lubrication to minimize friction and heat buildup.
• For left-hand threads, turn counterclockwise to cut and disengage; back out gradually to clear chips.
• Clean threads after tapping and inspect for alignment and fit with the mating fastener.

Care & maintenance: Keep the tap clean and dry when not in use. Regularly re-lubricate during cutting operations and store in a dry environment to preserve the uncoated HSS tool’s performance over time.