M8-1.25 x 50mm 소켓 캡 나사 | 버튼 헤드 육각 소켓 드라이브 | 전체 나사산 | 클래스 10.9 합금강 열처리 블랙 옥사이드 (200개/팩)

The black oxide finish on these M8 screws looks clean and professional on my jig setup. The hex socket drive made installation straightforward with no cam-out issues. Exactly what I needed for precision assemblies.

Installed these on a few heavy-duty tooling fixtures and the thermal black oxide finish handled the shop environment with no rust. The hex socket drive seated perfectly with a standard 5mm Allen key, no stripping.

Used a dozen of these on a custom jig I'm building and the black oxide finish held up nicely under some light clamping pressure. Button head profile sits flush and the hex socket didn't strip at all with proper torque.