Meet the Wiseman Threading Tools Second Lead Metric HSS Tap Right Hand – M20x1.5, a purpose-built tapping solution for dependable, precision threading in metalworking projects. This uncoated high-speed steel tap is designed for general-purpose use, delivering consistent performance across a range of materials while keeping production moving smoothly.

What makes this tap stand out

• Second lead (double-start) design for faster thread formation and improved tapping throughput, especially on longer holes or tougher materials.
• High-speed steel (HSS), ground thread for clean, accurate threads and extended life under typical cutting conditions.
• Uncoated construction provides broad compatibility with cutting fluids and makes inspection of shallow defects easier during maintenance and rework.
• Metric, ISO 529 dimensions ensure consistent fitment with standard M20x1.5 taps and taps-compatible tooling in metalworking setups.
• Right-hand thread ideal for standard tapping applications, delivering predictable, clockwise thread formation with steady cutting action.
• USA plug lead configuration designed to fit common tapping setups in North American shops, aligning with standard workshop practices and tooling arrays.

This tap is crafted for engineers, machinists, and hobbyists who demand dependable performance without fuss. It shines in a variety of metals where clean thread creation matters—steel, aluminum, and other common alloys—making it a reliable workhorse in machine shops and on the shop floor.

Practical use and tips

• Pair with appropriate cutting oil or tapping fluid to reduce friction, manage heat, and extend tool life during deeper or more aggressive cuts.
• Use a steady, perpendicular feed and avoid over-penetration to preserve thread quality and reduce breakout or chatter.
• Follow standard tapping practices for blind or through holes, and ensure the drill size used for the pilot hole matches the hole depth and material you’re working with.
• Schedule inspections after the initial engagement to confirm thread accuracy and correct any deviation early in the process.

Ideal use scenarios

• General purpose thread creation in machine frames, brackets, and housings where an M20x1.5 thread is required.
• Prototyping and production runs where speed and reliability matter, thanks to the second-lead design.
• Repair or retrofit projects needing robust, repeatable threading tools without specialized coatings.

With the Wiseman Second Lead HSS Tap, you gain a precise, durable tool that aligns with ISO 529 standards and standard North American tapping practices. It’s built to perform, endure, and deliver consistent threads—from the first pass to the final cut.