The Wiseman Threading Tools Metric Fine HSS Hand Tap Set ISO529 - M39x2 is a precision-made solution for crafting clean, reliable metric threads in metal. Built with high-speed steel and ground for accuracy, these taps are uncoated for versatile use across common workshop materials. Following ISO 529 dimensions, they deliver predictable performance and interchangeability for handheld tapping tasks in steel, cast iron, and aluminum when paired with proper lubrication and drill sizing.

What you get

• Three-tap set designed for through-hole and blind-hole threading: taper (start), second (intermediate), and bottoming (final) leads to ensure smooth progression from start to finish.
• Metric fine thread range aligned with ISO529 specifications for M39x2 right-hand threads, ensuring consistent fit and compatibility with standard metric holes.

Why this set stands out

• High-speed steel ground taps provide durability and precise thread profiles, ideal for repeated use in demanding metalworking environments.
• Uncoated design offers broad compatibility with cutting oils and coolants, reducing chatter and promoting better chip clearance in a variety of materials.
• ISO 529 compliance guarantees standardization across tools and parts, making replacements and cross-compatibility straightforward in a professional shop or home workshop.
• Right-hand threading is the most common configuration for metric threads, simplifying installation and reducing the risk of cross-threading when done with care.

Technical snapshot

• Thread type: Metric fine ISO thread (M39x2)
• Lead progression: taper → second → bottoming for controlled starting and full-depth threading
• Material and finish: High-speed steel, ground, uncoated for general-purpose use
• Standards: ISO 529 dimensions

Best-use scenarios

• Repairing or fabricating metric holes in structural steel, automotive components, machinery housings, and fabrication projects where robust, accurate threads are essential.
• Prototyping or field repairs where a reliable hand-tap set is required to quickly establish or renew M39x2 threads without specialized equipment.
• Situations where you need a complete threading progression in one compact set—taper for starting, second for mid-depth, and bottoming for the final, full-depth thread.

Practical tips for best results

• Always drill the pilot hole to the size recommended for ISO 529 M39x2 tapping, then use cutting oil or lubricant to reduce friction and prolong tap life.
• Begin with the taper tap to establish a true alignment, then progress to the second tap and finish with the bottoming tap to reach full thread depth.
• Maintain a steady, even rotation and back off periodically to break and clear chips; clean the hole and re-grease as needed to maintain smooth cutting action.
• Store taps clean and dry after use to prevent corrosion and ensure long tool life for repeated projects.

Whether you’re outfitting a professional workshop or equipping a serious hobbyist’s toolkit, this Wiseman M39x2 hand tap set provides a reliable, standardized solution for creating strong metric threads with confidence. The three-lead design—taper, second, and bottoming—ensures a controlled start, accurate depth, and clean finish, helping you complete precision threading tasks efficiently and predictably.