HOLO-KROME 87079 براغي رأسية مقاس M5-0.8 × 50 مم | محرك سداسي الرأس مسطح | فولاذ سبائكي مؤكسد أسود حراريًا (100/عبوة)

The black oxide finish took the machining marks nicely and hasn't shown a hint of rust after a month in my damp garage. Threads engaged cleanly into my aluminum jig without any galling, and all 100 pieces had consistent depth.

The flat head sits perfectly flush in my jig fixtures, and the black oxide finish has held up well through repeated assembly and disassembly. The whole 100-count pack came neatly organized, so no hunting for damaged threads.

These are exactly what I needed for a jig I was building—the black oxide finish gives them a clean look and seems like it'll resist wear well. The flat heads sit flush perfectly in the countersunk holes.