براغي رأس مقبس M14-2 X 65 مم | رأس مسطح مع محرك سداسي | ملولب جزئيًا | فئة 12.9 سبائك فولاذية مؤكسدة حرارياً باللون الأسود (25 / عبوة)

I’ve used these for a jig assembly and the black oxide finish held up nicely without smearing or rubbing off. The partial threads seated cleanly into the tapped holes, and the hex socket drive gripped firmly with no wobble. These are solid fasteners for the price.

The hex socket drive on these gave a perfect grip without any cam-out, and the black oxide finish looks clean on my machine tooling. Installed a dozen into a precision assembly yesterday and they seated smoothly with no binding.

Used a full set of these on a custom jig for a milling fixture, and the partially threaded design gripped perfectly without bottoming out. The black oxide finish held up against vibration and didn't leave any residue on threads. Exactly what I needed for heavy-duty assembly work.