M4-0.7 X 12mm 소켓 캡 나사 | 로우 헤드 육각 소켓 드라이브 | 전체 나사산 | 클래스 10.9 합금강 열처리 블랙 옥사이드 (400개/팩)

Ordered these for a jig I'm building and the 12mm length fits perfectly into my drilled holes without any slop. The hex socket drive grabs cleanly with my allen key, and the class 10.9 strength gives me confidence they won't strip under load.

The black oxide finish on these is really clean and uniform, made them easy to handle with a hex key without slipping. Great fit for my jig assembly since the low head profile sits flush in tight spaces.

Needed a batch of high-strength fasteners for a jig setup and these were exactly the spec I ordered, the black oxide coating looks even better in person. Threads are clean and consistent across all 400, so no chasing or binding when driving them in.