소켓 캡 나사 M16-2 x 220mm | 플랫 헤드 육각 소켓 드라이브 | 부분 스레드 | 12.9급 합금강 아연 도금 (10개/팩)

These fit perfectly on the adjustment brackets for my press brake jig, and the 12.9 alloy steel gives me confidence they won't strip out under high torque. The zinc plating is smooth and even, not flaky like some cheaper hardware I've used.

Needed to replace some worn bolts on a milling fixture, and the partial threading on these made alignment much easier than with fully threaded ones. The hex drive seated perfectly with no cam-out. Exactly the strength needed for that setup.

Installed these on a heavy jig I'm building, and the hex socket drive made torquing them down much easier than a standard hex head. The 12.9 alloy steel feels rock solid under load, and the zinc coating is already holding up well in my shop.