M12-1.75 x 40mm ソケットキャップスクリュー | ボタンヘッド六角穴付き | 全ねじ | 10.9級合金鋼 熱処理黒色酸化被膜 (100個/パック)

I needed some sturdy bolts for a jig I’m building, and these M12s came fully threaded with a nice hex socket drive that fits my Allen wrench perfectly. The Class 10.9 alloy steel feels solid, and the black oxide finish gave them a clean, uniform look right out of the package.

The black oxide finish feels premium and the hex socket drive seated perfectly on my torque wrench. I've used a couple dozen so far in my fixture builds and not a single stripped head or burred thread. The 10.9 grade gives me real confidence under load in my jigs.

Installed these on a heavy-duty press fixture and the Class 10.9 alloy steel held torque perfectly without any stripping—very impressed with the black oxide finish's grip too.