M6-1 x 85mm 內六角螺絲 | 六角驅動 | 部分螺紋 | 12.9級合金鋼熱處理黑色氧化 (200 / 包)

These M6-1 x 85mm screws are exactly what I needed for a heavy-duty jig project—the 12.9 alloy steel feels incredibly solid, and the partially threaded design makes them easy to align. I've used about half the pack so far, and every thread has engaged perfectly without any stripping.

The 200-piece count is perfect for my jig-building projects, and the black oxide finish gives them a professional look that resists wear well. These bolts threaded smoothly into my fixture plates without any binding, which saved me a lot of time during assembly.

The hex socket drive made installation on my precision fixture effortless, and the black oxide finish looks clean and professional. A solid choice for tooling that needs to stay tight under load.