براغي ذات رأس سداسي M42-4.5 × 170 مم | فولاذ فئة 10.9 عادي | ملولبة جزئيًا (1 / عبوة)

These M42 bolts handled the torque perfectly when I was securing a heavy press frame, the Class 10.9 steel feels seriously robust. Thread engagement was smooth right from the start, no binding at all.

The partially threaded design made alignment in my jig setup much faster than expected, and the hex head took my impact wrench without any stripping. Pretty impressed with the build quality for a single bolt this size.

These bolts took some serious torque without the hex head stripping out, which was my main worry with a fastener this size. The partial threading made alignment in the equipment frame a lot easier than a fully threaded shaft would have been.