براغي رأس كبس M16-1.5 × 30 مم | محرك سداسي | ملولبة بالكامل | فئة 12.9 من سبائك الصلب أسود حراري (40 / عبوة)

Used these for a jig I was building, and the black oxide finish held up better than I expected against minor scuffs. The hex socket seated perfectly without any stripping, and all 40 pieces were cleanly threaded. Saved a good bit over what the local hardware store wanted.

These M16 bolts threaded smoothly into my jig fixture without any binding. The Class 12.9 hardness gives me confidence they won’t snap under heavy clamping pressure.

The black oxide finish really resists oil and grime on the machine floor, and the hex socket drive makes installation on my jig setup much easier than hex head bolts. These 30mm screws offer a strong, tight fit with no wobble.