براغي ذات رأس مقبس HOLO-KROME 60152 5/8-11 × 2-1/2 بوصة | رأس مسطح محرك سداسي | فولاذ سبائكي مع أكسيد أسود حراري (25 / عبوة)

I was worried about stripping the hex drive on these, but the socket held up perfectly when I torqued them into my jig. The 5/8-11 threads cut cleanly and the black oxide finish adds a nice touch of corrosion resistance.

The black oxide finish on these screws is exactly what I needed for a machine tool rebuild, and the hex socket drive made installation straightforward. They threaded smoothly into tapped holes without any binding.

The thermal black oxide finish wiped clean easily and looks uniform across all 25 pieces, which matters when you’re torquing them down on a fixture. Threads engaged smoothly right out of the box, no chasing needed for a precision assembly.