M3 X 5mm 滾花杯頭內六角止付螺絲 | 合金鋼 (1000個/包)

The knurled cup point on these M3 screws really bites into the metal, so they hold tight without stripping. I just used a hundred of them to secure a jig, and the hex socket made installation a breeze in that cramped space. Exactly what I needed for the price.

I was impressed by how well these M3 set screws hold position even under heavy vibration, and the hex socket drive makes tightening in cramped spots much easier than slotted ones.

The knurled cup point really digs in securely once tightened, which gave me peace of mind on a vibration-prone application. They threaded smoothly into the M3 holes without any cross-threading, and the 1000-count pack means I won't run out anytime soon.