براغي رأس أسطوانية M16-2 X 25mm | محرك سداسي داخلي | ملولبة بالكامل | فئة 12.9 من سبائك الصلب مطلي بالزنك (25 / عبوة)

The zinc plating is holding up perfectly on these M16 socket heads, and the hex socket drive fit my Allen key with zero slop. Threaded all the way down, they seated flush in my fixture without any binding.

I needed these for a tooling jig I’m building, and the Class 12.9 grade feels noticeably stronger than the 8.8 screws I usually buy. The zinc plating gives a clean, even finish that should resist rust well.

The threads are cut clean and the hex socket fits a standard Allen key perfectly, no wobble. I used these for a jig I’m building and the class 12.9 hardness gives me confidence they won’t strip under load. Packaging had them neatly separated, which saved me from sorting through a bag of them.