براغي غطاء مقبس M16-1.5 × 90 مم | محرك مقبس سداسي | ملولبة جزئياً | فولاذ سبائكي فئة 12.9 مؤكسد أسود حراري (25/عبوة)

The black oxide finish on these screws looks professional and held up perfectly when I installed them on my milling fixture. They threaded cleanly into the tapped holes without any binding, and the hex socket drive made tightening them with my Allen wrench effortless.

I needed a set of sturdy bolts for a jig build, and these 12.9 alloy steel screws handle the torque without stripping. The partial threading made alignment much easier than fully threaded options I've used before.

The black oxide finish on these looks clean and uniform, and the hex socket drove in smoothly with my Allen key without any stripping. Using them for a jig build and the partial threading held alignment perfectly.