The Wiseman Threading Tools Metric Fine HSS Hand Tap Set ISO529 - M40x3 is a precision-driven solution built for accurate, reliable threading in metalworking projects. Crafted from high-speed steel and ground to tight tolerances, these taps deliver clean, true threads in a range of machinable materials—from steel and cast iron to aluminum and brass. The set is uncoated, prioritizing consistent cutting action and easy cleanup with your favorite tapping fluid.

What’s included

• Three taps designed for complete threading: taper (lead) for starting threads, second (plug) for mid-depth cutting, and bottom for full-depth finishing.

Key features that matter

• Material: High-speed steel (HSS) with precise ground threads for consistent bite and minimum chatter.
• Finish: Uncoated for predictable performance and compatibility with lubrication during cutting.
• Standard and compliant: ISO 529 dimensions with metric M40x3, right-hand threads, ensuring compatibility with common industry components and manuals.
• Three-lead configuration: Taper, second (plug), and bottom leads cover starting, progression, and finishing passes in a single kit.
• Versatile applications: Ideal for repair work, prototyping, and fabrication projects where robust, accurate M40x3 threads are required.

Practical use and best practices

1. Prepare the workpiece and drill a pilot hole sized to ISO 529 guidelines for M40x3 to ensure optimal cutting conditions.
2. Lubricate with a quality tapping fluid to reduce heat and extend tap life; ensure the tap remains square to the workpiece.
3. Begin with the taper lead to establish the thread profile, then progress with the second (plug) lead, ending with the bottom lead to reach full depth.
4. Back off periodically to break chips and clean the flutes, then resume cutting to the desired depth. Deburr after tapping.

Maintenance and care

• After use, clean away chips, dry thoroughly, and store in a dry, organized holder to preserve edge geometry.
• Use lubrication consistently to reduce wear and maintain thread accuracy over time.

Why choose Wiseman for threading tasks

• Renowned for durable, precise threading tools that professionals rely on in production environments and workshop projects.
• ISO 529 compliance provides confidence that your M40x3 threads will match standard specifications across applications.
• HSS construction with ground taps offers dependable performance, especially when paired with proper lubrication and controlled cutting speeds.