Wiseman Threading Tools Second Lead Metric HSS Tap Left Hand - M4x0.7

The Wiseman Threading Tools Second Lead Metric HSS Tap Left Hand - M4x0.7 is a precision internal-threading tap engineered for reliable left-hand threads in metric holes. Crafted from high-speed steel, this tap is ground for a clean, accurate thread form and finished uncoated to maximize cutting efficiency across a range of common metals.

• Material & finish: High-speed steel (HSS) ground tap, uncoated for dependable bite and precise thread generation in the target material.
• Thread orientation: Left-hand thread, ideal for applications that require reverse threading or secure, tightening under rotation.
• Lead geometry: Second lead with USA plug lead design, engineered to start smoothly and cut more material per pass for faster, cleaner tapping.
• Standards & compatibility: Meets ISO 529 dimensions for M4x0.7 threads, ensuring consistent engagement with standard metric holes.
• General-purpose use: A versatile tool for hobbyists and professionals alike—well-suited for light to moderate tapping of aluminum, brass, and other soft-to-medium metals common in workshops and fabrication shops.

Use this tap when you need durable performance in metric left-handed threads. Pair it with a quality tap wrench and use a light cutting oil to minimize heat and chips, maintaining the integrity of both the tap and the workpiece. Start with a gentle turn to engage the thread, then advance with steady, even pressure until the full thread depth is established. After tapping, back out gradually to clear chips and prevent binding.

Ideal scenarios include repairing or fabricating components that require left-handed fasteners, creating secure holes in soft metals, and performing precise rethreading in metric specifications. With its second-lead design, this tap reduces cycle times without sacrificing thread quality, making it a dependable choice for projects that demand efficiency and accuracy.