M16-1.5 X 100mm ソケットキャップスクリュー | 六角ソケットドライブ | 部分ねじ | クラス12.9合金鋼 亜鉛メッキ (25本/パック)

The partial threading on these M16s makes alignment in my fixture way easier, since the unthreaded shank seats cleanly without binding. Zinc plating looks uniform and the hex socket drive took torque without stripping.

I needed M16 cap screws for a jig I’m building, and these fit perfectly with no wobble. The hex socket drive is clean and takes torque well. I’ve used cheaper alternatives before, but these are noticeably denser and feel more solid.

The zinc plating on these 12.9 alloy steel screws is flawless—no chips or dull spots out of the package. I’ve torqued them into a jig fixture and the hex socket hasn’t stripped, even with a cheater bar.