M6-1 x 16mm 소켓 캡 나사 | 버튼 헤드 육각 소켓 드라이브 | 풀 스레드 | 10.9급 합금강 열처리 블랙 옥사이드 (600개/팩)

The hex socket drive seats perfectly with a standard Allen key, and the black oxide finish feels consistent across all 600 pieces. Threads ran clean through steel plate without a single binding or stripped head. Solid deal for a full box of Class 10.9 hardware.

I needed a bulk supply of these for a custom jig build, and the hex socket drive makes tightening them in tight spaces so much easier than a traditional hex head. The Class 10.9 rating gives me confidence they'll hold up under repeated use without stripping.

Installed a full set of these on a custom tooling fixture and every single screw threaded perfectly without any binding. The black oxide coating feels durable and hasn't scratched during tightening.