براغي رأس مقبس M16-2 × 160 مم | رأس مسطح بمحرك سداسي | ملولبة جزئيًا | فولاذ سبائكي كلاس 12.9 معالجة حرارية بأكسيد أسود (10 / عبوة)

Installing these in a jig this morning and the partially threaded section made alignment much easier than fully threaded bolts. The black oxide finish looks great and went in smoothly without any binding. Exactly the high-torque fasteners I needed for heavy machinery.

The hex socket drive on these M16 bolts made torquing them down in tight spaces much easier than using a standard wrench. The black oxide finish seems very durable and hasn't chipped during installation on my jig.

Installing these on a precision assembly, the hex socket drive gripped perfectly without any cam-out. The black oxide finish has a nice, even look and feels robust. They threaded cleanly into my jig, so I’m happy with the purchase.