Introducing the Wiseman Threading Tools Second Lead Metric HSS Tap, a precision-ground, uncoated high-speed steel tap designed for fast, dependable metric threading in everyday workshops. This right-hand thread tap follows ISO 529 dimensions and features a second lead for quicker thread formation, delivering clean, accurate threads with fewer turns.

The tap is built from high-speed steel (HSS) for durability and heat resistance, making it suitable for steel, stainless, aluminum, brass, and other common metals. Uncoated tooling allows you to apply your preferred cutting fluids and enjoy smooth chip evacuation and longer tool life in a variety of materials.

Key features and benefits:

• Second lead geometry: two-start threading that reduces the number of turns to reach full depth, increasing productivity on through-holes and blind holes alike.
• Metric compatibility: M34x1.5 thread forms, adhering to ISO 529 standards for consistent, interchangeable results.
• Right-hand thread: standard orientation for most CNC and hand tapping operations, compatible with common fasteners and assemblies.
• General-purpose, uncoated finish: ideal for general metalworking tasks where coolant or lubricant can optimize performance.
• Precision-ground tip and flute geometry: designed to produce crisp, true threads with minimal chatter and good surface finish.

Who should use this tap? Ideal for machinists, fabricators, auto enthusiasts, and shops that routinely produce metric threads in through-holes or deep pockets. Use it when you need reliable, repeatable threads in steel, cast iron, aluminum, brass, and other machinable metals, with a tool you can count on for daily production or one-off builds.

Compared to other taps, the Wiseman second-lead HSS tap emphasizes fast cutting without sacrificing thread accuracy. The uncoated finish means you can tailor lubrication and coolants to your workflow, whether you’re hand-tapping small batches or running the tap in a powered chuck.

For best results, pair this tap with a matching drill size per ISO 529 guidelines, use steady pressure, and withdraw frequently to break chips. Always follow proper tapping practices and use appropriate cutting fluid to extend life and maintain thread quality.