براغي رأس سداسي M16-1.5 × 150 مم | فولاذ كلاس 8.8 مطلية بالزنك | ملولبة جزئياً (15 / عبوة)

These partially threaded M16s are exactly what I needed for a heavy equipment bracket—the zinc plating looks clean and the threads engaged smoothly. The hex head sat flush with a socket wrench, and after a couple of weeks of vibration, not a single one has backed out.

Had to torque these down pretty hard on a press frame, and the class 8.8 rating held without any stretch. The partial threading made alignment in a blind hole much easier than a fully threaded bolt would have.

The hex head grabs a socket perfectly, and the zinc plating looks clean and even across all 15 pieces. Threaded them into a steel frame today and the class 8.8 hardness held up without a hint of stripping.