Product Specifications:
This HSSE left-hand spiral flute tap is manufactured to A23 DIN 15D standard, specifically designed for cutting left-hand threads in through-hole and blind-hole applications. The 15° left-hand spiral angle ensures efficient chip evacuation for left-hand cutting, while the 3‑flute design provides balanced cutting action and excellent thread finish. With an overall length of 100mm and working length of 22mm, it is suitable for medium-depth left-hand threads in steel, stainless steel, aluminum, and cast iron.
The M12x1.25 LH tap is commonly used in applications requiring left-hand threads, such as anti-rotation fasteners, turnbuckles, left-hand lead screws, automotive components (e.g., left-hand lug nuts), and machinery safety devices. The uncoated HSSE substrate offers good wear resistance for general-purpose machining. For higher speeds or abrasive materials, TiN or TiAlN coatings can be applied upon request.
Custom options include right-hand versions, reduced shank diameters, and special thread tolerances (6HX, 4H). For high-volume production of left-hand threads, this HSSE tap delivers reliable performance and consistent thread quality. OEM orders are welcome.
Spiral flute taps are ideal for blind holes (chip evacuation upward), while spiral point taps are best for through holes.Read full guide →
Available coatings: TiN (gold, general purpose), TiAlN (violet, high heat), CrN (silver, low friction), AlCrN (dark gray, hard materials). View full coating guide →
Metric: M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, M24, M30. Also available in UNC, UNF, and NPTF threads. Custom lengths and shank configurations. View more size chart →
