M10-1.25 X 75mm 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 (50顆/包)

Used a handful to secure a custom jig fixture on my mill table, and the black oxide finish has held up perfectly against light coolant spray. The 12.9 alloy steel feels noticeably stronger than standard hardware, and the hex socket drive let me torque them down precisely without stripping.

I used these on a custom jig for the shop, and the hex socket drive seated perfectly without any wobble. The 75mm length gave just the right grip for the steel plates I was joining.

The threads cut clean and the black oxide finish is even across every one of the fifty — no burrs or flaking when I torqued them into my jig. Class 12.9 is the real deal for holding a heavy fixture together.