The OSG Metric A‑Spiral Flute Threading Tap is a left‑hand, powder metal tool engineered for precise threading in blind holes with a metric M4 x 0.7 size. Built for machinists who require durable performance and reliable results, it combines advanced coating and efficient chip evacuation to deliver consistent cuts in challenging materials.

• Left‑hand spiral flute design: enables smooth chip flow and reduces clogging when threading in blind holes, improving control and finish.
• Powder metal substrate: offers enhanced toughness and wear resistance for longer tool life under demanding tapping conditions.
• TiCN coating: multilayer TiCN coating increases hardness and wear resistance, helping maintain cutting performance over time.
• DIN 371 compatibility: engineered to DIN371 standards for reliable fit and consistent thread quality across compatible applications.
• Size and threading: M4 x 0.7 metric thread, specifically configured for blind-hole applications to ensure accurate, clean threads.
• Application focus: designed to perform in a range of common materials where blind-hole threading is required, with efficient chip evacuation and steady cutting action.

With its combination of a left‑hand spiral flute, durable powder metal body, and protective TiCN coating, this tapping solution delivers dependable tooling life and predictable results for blind-hole projects. It’s a precise, purpose‑built choice for technicians who value consistent thread quality, reduced downtime, and efficient manufacturing workflows.