براغي رأس أسطوانية M27-3 × 360 مم | محرك سداسي | ملولبة جزئيًا | فولاذ سبائكي درجة 12.9 أسود حراري

The black oxide finish looks great and should hold up well in my jig setup. These 12.9 alloy steel screws feel incredibly solid at this 360mm length, and the threading is clean all the way down.

The hex socket drive made installation straightforward even in a tight spot on my jig. I was impressed how the partially threaded design handled the load without any flexing. These M27 screws feel substantially more durable than what I've used before.

The black oxide finish on these screws is holding up perfectly in my shop jig, and the hex socket drive made installation straightforward with no stripping. They feel incredibly rigid for the size.