M2.5-0.45×16mm 內六角圓柱頭螺絲 | 六角驅動 | 全螺紋 | 12.9級合金鋼鍍鋅 (600個/包)

The drive socket fits a standard hex key without any slop, which made them easy to snug down in a tight spot on a jig I’m building. The zinc plating looks uniform and should hold up fine in my dry workshop.

I needed a bulk pack for my jig builds and these Class 12.9 alloy steel screws are seriously tough—much harder than the usual hardware store stuff. The zinc plating looks clean and uniform across all 600 pieces, which saved me a headache with rust.

The threads on these little M2.5 screws are cut perfectly, and the zinc plating gives them a clean, uniform finish that held up well during assembly. I needed a full box for a batch of jigs and every single one fit its socket driver without any stripped heads. Solid choice for precision work.