M16 X 100mm 杯端內六角止付螺絲 | 合金鋼 (25 / 包)

The cup point tip bites into the shaft really well, so once these are set they don't budge even under constant vibration. I've been using them to lock down a heavy-duty coupling and the alloy steel feels plenty tough for the job.

The hex socket drive made torquing these down in a tight spot a breeze, and the cup point chewed into the metal just as it should. Threads were clean, no burrs, and the alloy steel feels solid enough to trust for the long haul.

These set screws bit into the shaft perfectly thanks to the cup point tip, holding everything rock solid after a full day of use. The alloy steel feels really sturdy and the hex socket gave me plenty of torque even in a cramped spot. Exactly what I needed for a heavy-duty adjustment job.