Wiseman Threading Tools: Second Lead Metric HSS Tap, Right Hand, M40x1.5

Designed for dependable internal threading in metal, this Wiseman HSS tap is precision-ground for exact, repeatable results. With ISO 529 dimensions and a right-hand thread, it’s a true general‑purpose tool that performs consistently across common fabrication tasks. The second lead (USA plug lead) delivers faster material removal and smoother thread formation, helping you complete through-holes with fewer passes and less torque than standard taps.

What makes this tap stand out

• Material and finish: High-speed steel (HSS) with a precise ground finish. Uncoated construction means predictable cutting behavior and easier re-sharpening in-house.
• Size and pitch: Metric tap sized M40x1.5, a versatile option for medium-diameter holes and typical machine layouts.
• Thread type and lead: Right-hand thread with a second lead (USA plug lead) for accelerated chip formation and smoother entry into the material.
• Standard compliance: ISO 529 dimensions ensure compatibility with standard dies, fittings, and tooling setups.
• Drive and compatibility: Square shank compatible with common tap wrenches and drill press setups for stable, straight threading.

Who should use this tap

• Machinists and metal fabricators seeking reliable, repeatable internal threads in steel, aluminum, and other common alloys.
• Maintenance technicians performing repair work where precise M40x1.5 threads are required.
• Hobbyists and makers assembling metal projects that demand strong, accurate threaded joints.

Why the second lead matters in practice

The second lead design engages more of the thread profile early in the cut, reducing starting resistance and helping chip evacuation stay ahead of the cutting edge. The result is faster tapping cycles, improved thread quality, and reduced heat buildup—especially valuable when threading thicker materials or deeper holes.

Best practices for optimal results

• Use appropriate cutting fluid or lubrication to prolong tool life and improve thread finish.
• Start with a clean, correctly sized pilot hole and maintain steady, straight alignment to avoid cross-threading.
• Back off periodically to break chips and prevent binding; finish with a light pass to refine the thread.
• Inspect the finished thread with the mating fastener to confirm fit and torquing requirements.

Practical insights and outcomes you can expect

With the Wiseman Second Lead Metric HSS Tap in M40x1.5, you’ll experience robust, dependable internal threads that stand up to use in assemblies, fixtures, and repair jobs. The uncoated HSS delivers natural cutting action that can be sharpened or restored in-house, making this tap a durable, long‑lasting addition to your toolkit. Whether you’re building a machine frame, repairing a hydraulic component, or fabricating parts for prototyping, this tap offers precise thread formation, repeatability, and compatibility with standard tapping setups.

Add this Wiseman tap to your machining arsenal and tackle metric threading with confidence, efficiency, and professional-quality results.