M6-1 x 6mm 六角凹頭螺絲 | 圓柱頭六角驅動 | 全螺紋 | 10.9級合金鋼鍍鋅 (600入/包)

Button head sits flush in my jig plate without catching, which is exactly what I needed for repeated clamping. The hex socket drive gripped cleanly on every single one of the 600 pieces, and the threading was consistent throughout.

I was a little worried the 6mm length wouldn't be enough for my jig, but the full threading on these M6-1 screws grabs perfectly in tight spots. The Class 10.9 alloy steel feels really solid and durable compared to the standard stuff I've used before.

The hex socket drive made installation a breeze on my jig setup, and the zinc plating on these Class 10.9 screws looks like it'll hold up well. Perfectly sized for precision assemblies—I've already used half the pack.