M3 x 4mm 錐點內六角止付螺絲 | 合金鋼 (500 顆/包)

Cone point bites into the shaft perfectly for a solid hold, and the alloy steel feels tough enough for repeated adjustments. The M3 size is exactly right for my small gearbox rebuild, and with 500 in the pack, I won’t run out anytime soon.

The hex socket drive made installing these in my 3D printer's hotend a breeze, even in those cramped corners. They hold their torque perfectly without stripping.

The cone point on these M3 set screws bites perfectly into soft metals without stripping. I’ve used half the bag for jig adjustments on my mini mill, and the alloy steel holds up much better than cheaper stainless.