M3-0.5 x 16mm 內六角螺絲 | 圓頭六角驅動 | 全牙 | 10.9級合金鋼熱處理黑氧化物 (800個/包)

The hex socket drive fits my precision jig perfectly without any stripping, and the 16mm length is exactly what I needed. For the price, getting 800 of these class 10.9 alloy steel screws feels like a solid deal for shop use.

These M3-0.5 button heads came at the perfect time for a jig I was assembling, and the black oxide finish makes them look much better than plain steel. The hex drive grabs cleanly with no stripping, so I’ll definitely be ordering another pack.

Pulled 800 of these out of the box and every single one has a clean, uniform black oxide finish with threads that cut smoothly into my jig plate. The 16mm length is perfect for what I’m building, and the Class 10.9 hardness gives me confidence they won’t strip under torque.