براغي ذات رأس أسطواني M12-1.75 X 50mm | رأس زرّي محرك سداسي | ملولبة بالكامل | فئة 12.9 سبيكة فولاذية مؤكسدة حرارياً باللون الأسود (100 / عبوة)

I needed a few for a jig I was building and these threaded in perfectly without any binding. The hex socket drive bit seated firmly with no wobble, and the black oxide coating looks clean and professional. For the price per piece, these are solid hardware.

The black oxide finish on these screws looks professional and resists rust better than plain steel, and the fully threaded design made my jig assembly a breeze. Install went smooth with no stripping thanks to the hex socket.

The hex socket drive fit my wrench perfectly, and the black oxide finish on all 100 pieces looked consistent right out of the bag. I used them for a jig build and they threaded in smoothly without any binding.