براغي رأس مقبس M6-1 × 50 مم | محرك مقبس سداسي منخفض الرأس | ملولبة جزئيًا | فولاذ سبائكي درجة 10.9 معالجة بأكسيد أسود حراري (100 / عبوة)

Pulling them out of the bag, the black oxide finish looked much more consistent and professional than I expected from a pack of 100. The hex socket drive bit fit snugly without any wobble, making installation into my jig frame smooth and frustration-free.

Used these 50mm low head screws to secure a jig plate on my mill, and the lower hex profile let me fit the wrench in a tight space. The black oxide coating seems durable, no issues after a couple of adjustments.

The partially threaded design made alignment much easier in my precision assembly jig. These bolts seat flush with a low head profile, and the black oxide finish looks clean and professional.