Meet the Wiseman Threading Tools Second Lead Metric HSS Tap Right Hand - M39x1.5, a precision tool purpose-built for clean, reliable metric thread cutting in metal. Crafted from high-speed steel and ground for sharp, consistent cutting edges, this tap is designed to deliver dependable results in a variety of metals, from steel to aluminum.

What makes this tap stand out

• Material and finish: High-speed steel (HSS) with a ground, uncoated finish that provides a precise cutting edge and strong wear resistance under typical workshop conditions.
• Metric precision: ISO 529 dimensions ensure compatibility with standard M39x1.5 holes and components, making it a dependable choice for metric thread work.
• Right-hand, second-lead design: The right-hand thread is the common orientation for most projects. The second-lead (two-start) design accelerates threading, reducing cycle time on through-holes and improving throughput without sacrificing thread quality.
• Size and compatibility: M39x1.5 thread pitch provides a robust, strong thread for larger fasteners and assemblies. Ideal for production runs, repairs, and fabrication work where dependable, repeatable results matter.
• Practical geometry: The tap features a square drive end that fits standard tap wrenches, enabling steady, controlled rotation and reliable guidance during cutting.

Where you’ll use it: machine shops, automotive repair benches, fabrication shops, and serious DIYers tackling larger metric threads. Whether you’re threading a through-hole on a steel chassis or repairing a damaged M39x1.5 thread in aluminum components, this tap helps you achieve concentric, smooth threads with minimal rework.

How to get the best results

• Secure the tap firmly in a quality tap wrench with square-drive alignment for true cutting pressure.
• Lubricate generously with a suitable cutting fluid or oil to reduce heat, extend tool life, and improve chip evacuation.
• Keep the workpiece steady and perpendicular to the tap to prevent cross-threading; start slowly and maintain steady pressure as you cut.
• Advance gradually, especially in deeper holes, and back off periodically to break and clear chips.
• Clean the threads after tapping and inspect with a metric thread gauge to verify alignment and pitch accuracy.

With the Wiseman Threading Tools Second Lead Metric HSS Tap Right Hand - M39x1.5, you’re choosing a purpose-built tool that blends dependable material quality, precise ISO-standard dimensions, and a design that speeds production without compromising thread integrity. Add it to your metalworking kit for consistently clean, accurate metric threads in a wide range of projects.