HOLO-KROME 73152 براغي رأس أسطوانية 5/8-18 X 1-3/4" | محرك سداسي | فولاذ سبائكي أكسيد أسود حراري (25 / عبوة)

The black oxide finish on these screws matches my machine tool table perfectly and they threaded in without any binding. Used them to secure a vise on my mill, solid as can be.

Put a dozen of these in a milling fixture and the black oxide finish held up better than I expected against coolant splatter. The threads started smoothly and the hex drive seated firmly with no wobble.

These are the ones I always reach for when building jigs and fixtures—the black oxide finish gives them a nice grip and the hex socket drive seats cleanly without stripping. They’re plenty stout for heavy-duty tooling work.