M14-2 X 35mm 內六角螺絲 | 平頭內六角驅動 | 全螺紋 | 12.9級合金鋼熱處理黑色氧化物 (50 / Pkg.)

The black oxide coating gave them a nice uniform finish that looks great on my tooling setup. Threads cut cleanly into the aluminum block without any binding, and the hex socket seated the driver perfectly. These are solid pieces for the price.

The black oxide coating on these screws is consistent and hasn't chipped during assembly, and the hex drive fits my bit perfectly without any wobble. I used them to secure a heavy-duty machine guard, and the 12.9 alloy steel feels noticeably tougher than standard hardware.

I needed a dozen for a jig rebuild and the 12.9 alloy steel feels seriously stout under torque. The black oxide finish wiped clean easily and hasn't shown any rust after a few days in a damp shop.