HOLO-KROME 640000090 #6-32 X 5/16" 소켓 캡 나사 | 육각 소켓 드라이브 | 합금강 열처리 블랙 옥사이드 (50 / 팩)

The black oxide finish on these #6-32 screws looks clean and seems tough enough for my jig builds. I used them to mount a small bracket on my drill press table, and the hex socket seated perfectly without any stripping.

Finally, a small screw that actually holds torque without stripping. The socket drive bites cleanly and the black oxide coating feels properly finished, not cheap. I've used them to rebuild a pair of precision jigs and they seat flush every time.

The black oxide finish on these #6-32s is evenly applied and no flakes in the threads, which makes them slide into tapped holes without binding. I’m on my third pack for precision assemblies and every single screw has driven clean without a stripped head.