M3-0.5 x 25mm 機械螺絲 | 圓頭一字驅動 | 18/8 不鏽鋼 (900 / 包)

Ordered these for a robotics project and the 25mm length was perfect for securing brackets through thicker panels. The cheese head sits flush without snagging on moving parts, and the 304 stainless feels solid.

Was a little worried about the slotted drive stripping, but the cheese head is deep enough that a standard driver bites firmly. The 18/8 stainless feels solid and the whole 900-count tin is heavy in the hand, so I've got plenty for years of projects.

Five hundred of these in one package means I won't be running out mid-project, and the 18/8 stainless steel handled a week of outdoor exposure without a speck of rust. The slotted drive took a bit of getting used to, but they thread cleanly into M3 nuts every time.