براغي رأس كبس مقبس M12-1.75 × 65 مم | محرك مقبس سداسي | ملولبة جزئيًا | فئة 12.9 فولاذ سبائكي مطلي بالزنك (50 / عبوة)

The threading is clean and uniform on every single one of the fifty, and the zinc plating looks like it will hold up well in my tooling fixtures. I torqued a few down to spec and the hex socket didn't strip or round out at all. Great value for a precision part.

Finally, a set of socket cap screws that actually hold up in my press tooling without stripping. The 12.9 grade is noticeably harder than the cheap stuff, and the zinc plating looks clean and even.

Needed a dozen for a tooling fixture upgrade, and the partially threaded design grabbed perfectly without binding. These hex socket screws feel solid under the wrench, and the zinc finish looks clean enough to keep rust away.