براغي رأس أسطوانية M16-2 × 55 مم | محرك سداسي برأس زر | ملولبة بالكامل | فولاذ سبائكي فئة 12.9 أكسيد أسود حراري (25 / عبوة)

The hex drive on these M16-2 screws grabbed my Allen key perfectly, no wobble at all. I used them to rebuild a jig fixture, and the 55mm length was just right for the thick steel plate. Nice to find tough hardware that feels solid in hand.

The thermal black oxide finish on these screws really holds up well even after tightening with an impact driver, and the hex socket didn't strip at all. I used them to secure some heavy-duty jig fixtures on my milling table, and the 12.9 alloy steel class gives me confidence they won't snap under lo

I needed some heavy-duty fasteners for a machining fixture, and these fully threaded M16 screws provided the exact grip I was after. The black oxide finish already seems more resistant to shop oil and moisture than plain steel ones I've used.