The OSG Metric A-Spiral Flute Threading Tap is a precision left‑hand tap designed for clean, reliable blind‑hole threading in metric sizes. Built for machinists and shops that demand durability and consistency, it delivers steady performance in tight tolerance work.

• Thread Type: Left‑hand (LH) M3 x 0.5 threading for reverse‑direction applications and specific assembly requirements
• Size / Pitch: Metric M3 with 0.5 mm pitch, DIN371 compliant for standardization and compatibility
• Material: Powder Metal substrate for toughness and wear resistance under demanding cutting conditions
• Coating: TiCN coating to enhance tool life and reduce wear during frequent, precision cuts
• Flute Design: A‑Spiral flute engineered for efficient chip evacuation in blind holes, minimizing clogging and heat buildup
• Application: Ideal for blind‑hole threading across a range of materials where precise metric left‑hand threads are required
• Standards: DIN371 specification supporting reliable interchangeability with other DIN371 taps

The combination of a TiCN coating and powder‑metal substrate provides strong wear resistance and extended tool life, helping you achieve consistent thread quality with fewer insertions and rework. The A‑Spiral flute’s optimized chip flow reduces the risk of built‑up material in deep or recessed holes, translating to smoother operation and tighter control over thread dimensions. Designed specifically for left‑hand threaded components, this tap ensures dependable performance in reverse‑thread assemblies or specialized fastener systems, while DIN371 compatibility keeps your tooling ecosystem cohesive and easy to replace.