M3 X 20mm 杯頭內六角止付螺絲 | 合金鋼 (250 顆/包)

Perfect fit for the 3D printer aluminum extrusions I'm working on. The hex socket drove them in smoothly even in those hard-to-reach corners, and the cup point really bites into the T-nut channel.

The cup point bit into the shaft exactly where I needed it—no slipping, even at a tricky angle in the gear assembly. At 250 per pack, I’ll be set for a year of builds and repairs.

The hex socket drive made tightening these M3 screws in a tight spot much easier than I expected. They feel solid and the cup point design holds well in the aluminum I'm working with.