براغي ذات رأس أسطواني من HOLO-KROME 72230 1/2-13 X 1-1/2" | محرك سداسي | فولاد سبائكي مع طلاء أكسيد أسود حراري (50 / عبوة)

Finally a cap screw set where every single bolt threads cleanly and there are no rejects in the box. The black oxide finish hasn't chipped off on the threads, which was my old pet peeve.

Used these for a jig I was building at work, and the black oxide finish held up nicely against some minor coolant splashes. The threads cut cleanly into the tapped holes without any binding.

Finally getting around to replacing the worn bolts on my milling machine vise, and these threaded in smoothly with no binding. The black oxide finish feels durable and they seated perfectly in the counterbore.