HOLO-KROME 69382 M5-0.8 X 30mm 內六角螺絲 | 低頭六角驅動 | 合金鋼熱處理黑氧化物 (100顆/包)

I ordered these for a jig I was building and the M5-0.8 threads fit perfectly into the tapped holes. The black oxide finish gives them a clean, uniform look that resists rust better than plain steel screws.

The low head profile is a lifesaver for tight clearance spots on my jig builds, and the hex socket grips well without stripping. Threads ran smooth into pre-tapped holes, though a couple had slightly uneven coating that didn’t affect function. Good value for a hundred-pack if you need consistent M5

The black oxide finish has held up well through several assembly jobs without any rust or wear marks. Threads engage smoothly and the low head profile is handy for tight clearances, though the hex socket feels slightly shallow compared to other caps I've used.