Metric Left‑Hand HSS Hand Taps are designed for producing left‑hand internal metric threads used in specialised engineering, machinery repair, and rotating‑assembly applications where standard right‑hand threads are unsuitable. Left‑hand threads are commonly used to counter rotational forces, prevent loosening under load, and ensure secure fastening in equipment such as compressors, motor shafts, rotating fixtures, and certain automotive or mechanical assemblies.
Manufactured from high‑speed steel, these taps deliver strong durability, smooth cutting performance, and consistent thread accuracy in materials including mild steel, aluminium, brass, and copper alloys. Second taps provide accurate sizing and clean thread formation, making them ideal for both general workshop use and precision repair work. The available size range—from M8×1.0 through to M24×3.0—covers light‑to‑heavy mechanical applications requiring reliable left‑hand thread engagement.