HOLO-KROME 76215 M6-1 x 110mm 소켓 캡 나사 | 육각 소켓 드라이브 | 합금강 열처리 블랙 옥사이드 (100/팩)

The black oxide finish on these M6 screws is really clean and uniform, and they threaded smoothly into my jig without any binding. For the price per piece, you get solid alloy steel hardware that feels substantial for machinery mounts.

Used a handful of these to mount a heavy steel bracket on a machine frame, and the black oxide finish held up perfectly against oil and minor scratches during assembly. The threads cut cleanly into tapped holes without any binding.

I needed longer screws for a jig build and these M6-1 x 110mm cap screws fit perfectly, the hex socket drive made tightening them into tight spots a breeze.