HOLO-KROME 720000372 براغي رأس مقبس #5-40 × 1-1/4 بوصة | محرك سداسي | فولاذ سبائكي أكسيد أسود حراري (25/عبوة)

The black oxide finish on these screws gives a nice, consistent look across the whole pack, and they threaded into my precision assembly without any binding. Fit and finish are exactly what I want for a small fastening job.

I’ve been using these in a jig for a few weeks now, and the hex socket drive makes assembly much easier than a standard slot. The thread engagement feels precise and the black oxide has held up well to handling.

The black oxide finish held up perfectly during assembly with no galling or binding. Used these to mount a precision fixture, and all 25 pieces were consistently threaded and burr-free.