براغي ذات رأس أسطواني مجوف HOLO-KROME 61040 3/8-24 X 5/8" | محرك سداسي برأس مسطح | فولاد سبائكي مع أكسيد أسود حراري (100 / عبوة)

These little screws are perfect for my jig fixtures—the flat head sits flush and the hex drive grabs without stripping. The black oxide finish has held up well after a few weeks of assembly and disassembly. Good value for a hundred pieces.

The black oxide finish on these screws is even and consistent across all 100 pieces, which made them look great on my milling fixture. They seated perfectly flush with the countersink, no wobble or chatter during cutting.

Finally, a socket cap screw that holds up in my jig builds without stripping. The black oxide finish looks clean and seems to resist oil better than plain steel.