M24-3 X 75mm 內六角螺絲 | 內六角驅動 | 全螺紋 | 強度12.9級合金鋼 熱處理黑氧化物 (10 顆/包)

I needed some heavy-duty bolts for a fixture at work and these M24 screws handled the load without any issues. The black oxide finish is consistent and the threading is clean all the way down the 75mm length.

The hex socket drive on these really helps get them seated firmly with a standard Allen key, which matters for my tooling setups. They fit perfectly into the jig holes without any wobble, and the black oxide finish looks like it’ll hold up well in the workshop.

Installed these on a jig I’m building and the threads ran perfectly smooth into the tapped holes, no binding at all. The black oxide finish gives them a nice, uniform look and they feel solidly heavy in the hand.