Wiseman Threading Tools Taper Lead Metric HSS Tap Right Hand - M39x1.5 is a purpose-built internal threading tool designed for precision, reliability, and longevity in metalworking. Crafted from high-speed steel and ground to exacting standards, this tap delivers accurate internal threads in a range of metals while maintaining smooth performance under demanding conditions. Its taper lead and ISO 529-compliant dimensions ensure a controlled, gradual cut that simplifies starting threads and reduces tool stress—even when you’re tackling thicker walls or tight tolerances.

Why this tap stands out

• Taper lead for smoother starts: The gradual engagement of the cutting edge minimizes chatter and deflection, helping you establish clean, concentric threads from the first pass.
• High-speed steel, ground finish: A robust, wear-resistant core meets a precise ground thread, delivering dependable performance and longer life in demanding materials.
• Uncoated, general-purpose utility: The uncoated finish accepts your favorite cutting fluids, improving heat dissipation and helping chips clear more efficiently during tapping.
• Metric right-hand thread, M39x1.5: A standard metric size with a right-hand thread, designed for common internal threading applications and easy integration with existing tooling ecosystems.
• ISO 529 compliant dimensions: Confidence that the tap will thread cleanly with compatible workpieces and accompanying tapping tools in professional shops and home workshops alike.

Ideal use cases

• Repairing or fabricating internal threads in steel, aluminum, brass, and other common metals where a strong, precise threaded hole is essential.
• Automotive, machinery, and equipment maintenance projects that require robust, dependable threading tools for larger bore sizes.
• Prototype development and light production where quick setup and repeatable results matter.
• Workshops and DIY setups seeking a single, reliable taper-lead tap for metric threads.

How to get the best results

• Drill a properly sized pilot hole prior to tapping to ensure clean engagement and consistent thread depth.
• Lubricate with a suitable cutting fluid to reduce friction, improve chip evacuation, and extend tool life.
• Maintain a steady, perpendicular approach during tapping, and back off periodically to clear chips and prevent binding.
• Inspect the finished thread with a gauge to verify pitch, depth, and alignment before assembly.

Technical specs at a glance

• Material: High-speed steel (HSS)
• Finish: Uncoated
• Thread direction: Right-hand
• Lead: Taper lead
• Thread size: M39x1.5
• Standard: ISO 529

Designed for serious metalworkers who value precision and durability, the Wiseman Threading Tools Taper Lead Metric HSS Tap Right Hand - M39x1.5 is a dependable choice for creating clean, strong internal threads with confidence. Whether you’re dialing in custom fasteners for a project or repairing compromised threads in equipment, this tap delivers consistent performance, time after time.