M6-1 X 50mm 소켓 캡 나사 | 접시머리 육각 소켓 드라이브 | 부분 나사산 | 12.9급 합금강 아연 도금 (200개/팩)

The partially threaded design made aligning my jig components so much easier than fully threaded bolts. Solid feel from the 12.9 alloy steel too, though I'd recommend a quality hex key to avoid stripping the socket.

I was replacing some worn hardware on a precision assembly, and the partially threaded design made these much easier to align than standard bolts. The hex socket drive bit snugly without any stripping.

The heads sit perfectly flush in my jig setup, and the zinc plating looks clean and uniform across all 200 pieces. Thread engagement is smooth too, no grit or binding when I drive them into tapped holes.