M24-3 x 200mm 六角穴付きボルト | 六角ドライブ | 半ねじ | クラス12.9 合金鋼 亜鉛メッキ (10本/パック)

Used these on a heavy-duty jig I'm building, and the hex socket drive made installation with my torque wrench a breeze. The partially threaded design gripped perfectly without needing extra lock washers.

The zinc plating looks flawless and the threads are perfectly clean—no burrs or rough edges at all. I used these on a heavy fixture build and the 12.9 alloy steel gives me real confidence; the partially threaded design seated exactly where I needed it.

Third time ordering these for our jig builds and the partial thread gives just the right amount of grip without bottoming out. The zinc plating has held up nicely against coolant splashes, no rust spotting after a few weeks on the mill. A solid, predictable fastener that torques down cleanly every t