HOLO-KROME 87208 M16-2 X 35mm 內六角螺絲 | 平頭內六角驅動 | 合金鋼 熱處理黑色氧化 (50/包)

The black oxide finish on these screws makes them look really clean in my precision assembly jig, and the hex drive seated perfectly without any stripping. They're solid M16-2 x 35mm cap screws that held up well under a good amount of torque.

I needed some heavy-duty fasteners for a jig I’m building, and these M16s fit perfectly into the tapped holes without any binding. The flat head sits flush, and the black oxide finish looks clean.

The black oxide coating on these M16s is exactly what I needed for my jig setup—no rust worries and they thread clean into the tapped holes. Pack of 50 means I've got spares for the next few builds.