Wiseman Threading Tools Second Lead Metric HSS Tap Left Hand - M18x1 is a high-speed steel ground thread tapping tool designed for precise left-hand threading in metalwork. This uncoated, general-purpose tap follows ISO 529 dimensions, ensuring reliable compatibility with standard metric threads and predictable results across a range of materials.

Built for speed and reliability, this tap features a second-lead design paired with a left-hand thread configuration. The second lead accelerates thread formation and improves chip evacuation, making reverse-threaded assembly and disassembly tasks faster and more consistent without sacrificing thread integrity.

Key specifications that matter in real-world work:

• Left-hand M18x1 thread for reverse-thread applications and specialized fastener assemblies.
• Second lead geometry to boost cutting speed and reduce tapping time in suitable materials.
• High-speed steel (HSS), ground finish for durable, accurate threads and long tool life, with an uncoated surface for versatile lubrication choices.
• ISO 529 compliant dimensions to ensure compatibility with standard metric taps and inserts used in professional shops.
• USA plug lead configuration designed to fit common U.S. tapping setups and fixtures.

Who benefits most from this tap?

• Machinists and technicians who routinely work with reverse-threaded components, fasteners, or fixtures that require left-handed threading.
• Maintenance technicians performing repairs or modifications on machines with reverse-threaded holes.
• Production environments where faster tap cycles are valuable and consistent thread quality is essential.

Practical usage tips for best results:

• Prepare a properly sized pilot hole according to standard M18x1 guidelines to ensure clean starts and minimize tool strain.
• Apply appropriate cutting oil or lubrication to reduce friction, heat, and wear when working with steel or aluminum.
• Use a steady, controlled feed and avoid aggressive plunging to maintain thread accuracy and extend tap life.

What’s included: a single Wiseman Threading Tools Second Lead Metric HSS Tap Left Hand - M18x1, engineered for dependable, repeatable left-hand thread creation in metric assemblies.