براغي رأس سداسية 5/16-18 × 4 بوصة | صناعة أمريكية | سبائك فولاذية Grade L9 زنك أصفر | خيط جزئي (50 / عبوة)

These replaced some old bolts on a skid steer attachment, and the L9 alloy steel feels noticeably tougher than what was on there. The yellow zinc coating has a good uniform finish, and the hex head seated perfectly with a socket.

I needed a high-strength bolt for a trailer hitch repair, and these L9 alloy steel cap screws fit the bill perfectly—the partially threaded design made assembly much easier. The hex head grabbed my socket wrench without slipping, and the yellow zinc coating looks like it'll hold up well outdoors.

The threads cut clean and the yellow zinc finish looks uniform across all fifty. These L9s are noticeably tougher than the grade 5s I replaced on my press brake, and the partial threading gave me just the right grip for my spacer setup.