HOLO-KROME 76056 M4-0.7 × 8 مم براغي رأس أسطواني بمقبس سداسي | محرك مقبس سداسي | فولاذ سبائكي بأكسيد أسود حراري (100 / عبوة)

I needed a small batch of M4 cap screws for a jig I was building, and these have the perfect thread engagement for that. The thermal black oxide finish looks more consistent than I expected, and they all thread smoothly without binding.

The black oxide finish on these M4 screws gives them a nice, uniform look and they thread into my precision assemblies with zero hiccups. I've used about 30 so far for tooling fixtures and the hex sockets haven't stripped once, even cranking them down tight.

Bought these for a jig I’ve been building, and the black oxide finish has held up nicely without any galling during install. The socket drive grabs cleanly with a hex key, and all 100 heads were uniform—no stripped threads or duds in the lot.