HOLO-KROME 73160 براغي رأس أسطوانية سداسية 5/8-18 × 3 بوصات | محرك سداسي | فولاذ سبائكي بأكسيد أسود حراري (25 / عبوة)

I've been using these for securing a jig on my mill and the socket drive made install much easier than a hex head would have. The thermal black oxide seems to be holding up well and they thread smoothly into tapped holes.

The black oxide finish makes these screws look great on my jig, and the hex socket drive seated perfectly on the first try. Used them for a tooling fixture and they held torque without any stripping.

These cap screws from HOLO-KROME are incredibly strong and the black oxide finish adds a nice layer of protection against rust. Using them on a jig build and the hex socket drive held up perfectly to repeated torquing without stripping.