M10-1.5×30mm ソケットキャップスクリュー | 皿穴付き六角穴付き | 全ねじ | 10.9級合金鋼 亜鉛メッキ (100 / パック)

I was skeptical about the hex socket drive stripping under torque, but these screws seated perfectly in my jig fixture without any cam-out. The 10.9 alloy steel feels noticeably denser than standard hardware store bolts.

The zinc plating is holding up great on these in a damp shop environment, no rust after a few weeks. The hex socket drive seated cleanly on the first try, and all 100 threads were consistent with no binding.

Used these on a tooling fixture where I needed a countersunk finish, and the flat head sits perfectly flush every time. The 10.9 alloy steel feels seriously tough, and the zinc plating has a clean, uniform look straight out of the bag. No stripped hex sockets in the bunch.