M4 x 16mm 杯頭內六角止付螺絲 | 合金鋼 (1000顆/包)

I needed a reliable set screw for a tight spot on my machine, and these M4x16mm cup points fit perfectly and held strong. The hex socket drive made installation simple even in a cramped corner.

I work on small electronics where space is tight, and the hex socket drive on these M4 screws lets me get them snug without stripping the head. The cup point tip also helps them seat flush against the panel, which keeps my builds looking clean. Pretty solid for a thousand-pack.

Finally a set screw that actually bites into the shaft instead of spinning loose—the cup point on these M4s is sharp and holds under vibration. The hex drive made installation a breeze even in that tight pulley.