براغي رأس سداسي M20-2.5 X 210mm | فولاذ مقاوم للصدأ 316 | خيط جزئي (10 / عبوة)

Installed these on a marine hatch that takes a beating from salt spray, and after two months there isn’t a hint of rust. The partial threading made alignment easier than expected with a standard socket.

The 316 stainless steel is noticeably denser than regular bolts I've used, and the partial threading made aligning this in a tight engine mount bracket much easier.

Picked up a pack of these for a marine project, and the 316 stainless held up perfectly against the salt spray without a trace of corrosion. The hex head gave a solid, no-slip grip with my socket wrench during installation.