Wiseman Threading Tools: Left-Hand M26x1 HSS Tap, Second Lead

Engineered for metalworkers who demand precise, reliable left-handed threading, this Wiseman HSS tap is a high-speed steel ground tool built for durable performance in general purpose applications. The uncoated finish keeps cutting behavior straightforward and compatible with a wide range of cutting fluids. With ISO 529 dimensions, it fits standard metric holes and interfaces cleanly with compatible tapping setups.

Key characteristics

• Left-hand thread: creates reverse threads on a workpiece for applications that require left-handed fasteners or reverse tightening.
• 26 mm major diameter, 1 mm pitch (M26x1): precise specification for mating with corresponding left-hand threaded components.
• Second lead (two-start) design: faster engagement and reduced tapping time, ideal for through-holes and production runs.
• Ground HSS, uncoated: sharp, accurate cutting edges with good heat resistance and broad metal compatibility.
• USA plug lead reference: indicates the lead configuration used in common American threading practices.
• General-purpose use: suitable for steel, cast iron, and other common metals with proper lubrication.

How and when to use

To achieve optimal results, secure your workpiece and apply a suitable cutting fluid or oil to minimize heat and wear. Start with a gentle, steady feed in a reverse (counterclockwise) direction to establish the left-hand thread, then maintain smooth, even pressure. Break chips frequently and back off to clear debris. This two-start tap works especially well in through-holes where rapid thread formation speeds up production. After tapping, deburr the entry and verify thread form with a thread gauge to ensure proper engagement.

Who benefits

• Machinists and fabricators dealing with left-hand fasteners in machinery, automotive components, and hydraulic systems.
• Repair technicians replacing damaged left-handed threads without reworking surrounding features.
• Educators or hobbyists seeking a reliable, general-purpose left-hand tap for metalworking projects.

Why this Wiseman tap stands out

Wiseman Threading Tools combine precision manufacturing with ISO-standard conformity. The left-hand, second-lead geometry delivers efficient cutting, reduced cycle times, and consistently clean threads that resist pull-out in typical service conditions. The uncoated finish supports straightforward lubrication and broad material compatibility, making this tap a dependable choice for ongoing shop use.