براغي رأس مقبس M18-2.5 × 45 مم | محرك رأس سداسي | ملولب بالكامل | فولاذ سبائكي فئة 12.9 أكسيد أسود حراري (25 / عبوة)

The black oxide finish looks sharp and resists fingerprints better than I expected during assembly. These have been holding tight in my jig setup for weeks without any loosening or wear on the threads.

The hex socket drive seated perfectly on my Allen key with zero wobble, and the 12.9 alloy steel feels seriously tough. I used them to bolt down a jig plate and they torqued up clean without stripping.

The black oxide finish gives them a nice, even look and they seated cleanly into my jig without any binding. For a 12.9-grade screw at this price, the threads are surprisingly crisp and the hex socket grabbed my allen key on the first try.