M4-0.7 X 22mm 機械螺絲 | 平頭十字驅動 | 18/8不鏽鋼 (900/包)

Used these for a small robotics project where corrosion resistance mattered. The flat heads sit perfectly flush, and the 22mm length was exactly right for my application. Good having 900 in a single package for bulk work.

I was pleasantly surprised by how smoothly these threads went into the predrilled holes—no stripping or binding. The flat heads seat flush without any sharp edges sticking out, which saved me a lot of frustration. I’ve been using them outside for some deck repairs, and the 18/8 stainless steel gives

The flat head sits perfectly flush in the aluminum brackets I'm using for a patio project, and the 304 stainless steel gives me confidence they won't rust. Packing 900 screws in one box saved me a trip to the hardware store.