M16-2 X 40mm 소켓 캡 나사 | 육각 소켓 드라이브 | 클래스 8.8 합금강 아연 도금 (50 / 팩)

Used these to secure a heavy-duty press fixture and the hex socket drive made tightening in tight spots much easier than a standard bolt. The zinc plating looks clean and the threads cut smoothly into the steel plate. Exactly what I needed for a reliable hold.

Built a custom jig for my milling machine with these and the M16-2 threads cut cleanly into pre-tapped holes without any binding. The zinc plating gives them a nice consistent finish, and the 8.8 grade steel feels plenty sturdy for heavy clamping loads.

The hex drive on these M16-2 x 40mm screws engages perfectly with my driver, making assembly on my jig much more straightforward than with slotted bolts. They're zinc-plated and feel solid, exactly what I needed for a sturdy machinery fixture.