M12-1.75 x 80mm 內六角螺絲 | 六角驅動 | 部分螺紋 | 12.9 級合金鋼鋅 plating (25 入/包)

Threads cut clean on all 25 pieces and the zinc finish looks even under a bright shop light. I’ve been torquing them into a steel fixture for a week with zero stripping, and the 12.9 hardness feels like it’ll outlast the project itself.

The 12.9 alloy steel is the real deal—these things feel rock solid in the hand, and the zinc plating has a clean, even finish. They threaded into my fixture smoothly without any binding, so they're doing exactly what I need them to do.

I needed a handful of these for a jig build, and the partial threading helped with alignment. The hex socket drive felt precise, and the zinc coating looks solid. One cap had a tiny burr on the edge, but it cleaned up fast.