براغي ذات رأس مقبس M5-0.8 × 20 مم | محرك سداسي مسطح الرأس | ملولبة بالكامل | فئة 10.9 من سبائك الفولاذ مع أكسيد أسود حراري (400 / عبوة)

I've been using these for assembly jigs in my shop and the black oxide finish seems to resist corrosion better than the plain steel screws I used before. The hex socket drive makes them easy to install with a simple Allen key.

These screws fit perfectly in my jig's holes, and the black oxide coating looks clean and professional. The hex socket drive grips tight without stripping, which is a relief compared to cheaper fasteners I've used before.

Pulled the first one out of the pack and the black oxide finish looks properly even, no flaking after torquing them into a steel fixture. Threads cut smooth into the holes with zero binding, and the hex socket grabbed cleanly at full depth. For the price per piece, these are a solid buy for any prec