M3-0.5 x 16mm 內六角螺絲 | 圓頭內六角驅動 | 全螺紋 | 10.9級合金鋼鍍鋅 (600/包)

The hex socket drive is clean and the zinc plating makes them look uniform straight out of the bag—no rust spots on the threads after a week on my bench jig. For the price per piece, these are a solid buy.

Used a full bag of these on my latest jig build and the zinc plating handled the shop grime without a single spot of rust. The 10.9 alloy steel feels solid, and having 600 in one box means I won't be reordering for a while.

The hex socket drive grips the allen key perfectly, no stripping even after I torqued them down on my jig setup. Zinc plating looks uniform across all 600, and the class 10.9 hardness gives me confidence they won't shear. Exactly what I needed for precision assemblies.