M3-0.5 x 20mm 소켓 머리 볼트 | 버튼 헤드 육각 소켓 드라이브 | 전체 나사산 | 클래스 12.9 합금강 아연 도금 (600개/팩)

The hex socket drive bit into my Allen key cleanly without stripping. For a budget pack of 600, these clamp down evenly and haven't snapped on me yet. Only wish they came with a slightly deeper socket for tighter spaces.

I needed a batch of strong fasteners for a small jig build, and these M3s fit the bill perfectly—the hex socket drive makes them easy to tighten without stripping. The 12.9 alloy steel feels sturdy enough for precision work, though the 20mm length was a hair shorter than I’d hoped for one part.

The zinc plating looks uniform and the hex sockets are crisp, so my 20mm lengths threaded into tapped holes without any wobble. They’ve held up fine in a jig I’ve been adjusting daily—only wish the pack came with a few spare extras, but 600 is plenty for most jobs.