براغي تثبيت برأس مقبس بنقطة كوب مخددة M5 × 20 مم | فولاذ سبائكي (250 / عبوة)

The hex socket drive grabbed my allen key perfectly even in a cramped corner where a regular wrench wouldn't fit, and the knurled cup point held firm against the shaft without slipping. These alloy steel screws feel solid and haven't stripped after a week of constant adjustments.

Installed these in a jig I use for drilling, and the hex socket drive let me really torque them down without stripping. The cup point holds firm against vibration even after a few days of use.

The knurled cup point really bites into the metal surface, keeping these set screws locked tight even under vibration. I used them to secure a collar on a motor shaft, and they haven't budged during testing.