M6-1 x 16mm 소켓 캡 나사 | 육각 소켓 드라이브 | 전체 나사산 | 클래스 8.8 합금강 열처리 흑색 산화 (600개/팩)

Installing these into some jig tooling and the 16mm length was exactly what I needed for a snug fit through a bracket. The black oxide finish seems durable enough to resist minor scratching during assembly, which is a plus.

The hex socket drive made tightening these into tight spots on my jig build much easier than using a hex key on a standard bolt. They threaded smoothly into pre-tapped holes without any binding. A solid choice for precision assembly work.

Just finished a tooling fixture and these M6-1 x 16mm screws held everything rock solid—the black oxide finish feels grippy in the hex socket, and the fully threaded shaft made alignment a breeze. Six hundred in the box means I won't be reordering for a while.