HOLO-KROME 73128 براغي ذات رأس أسطواني 7/16-20 × 2" | محرك سداسي | سبيكة فولاذ معالجة حرارياً بأكسيد أسود (50 / عبوة)

The black oxide finish on these 7/16-20 screws gives them a nice, consistent look, and they threaded into my tooling block smoothly without any binding. They feel sturdy enough for the heavy-duty fixturing I'm working on.

Been using these for a precision fixture assembly, and the hex drive on each screw fits snugly without stripping—actually torqued them to spec without issues. The black oxide finish has held up well against some light oil exposure too.

Installed these on my jig fixture and the threads engaged smoothly all the way down without binding. The black oxide finish looks solid and should resist rust in the shop.