براغي ضبط رأس مقبس نقطة كوب مقاس 5/16-24 × 5/8" | فولاذ سبائكي مطلي بالزنك (250 / عبوة)

The hex socket drive made these set screws incredibly easy to install in a cramped motor mount. After a few months in a high-vibration setup, they've held tight without any loosening. Solid value for that many pieces.

Had to tighten a vibration-prone jig on my mill and these cup points bit into the metal perfectly without stripping. The hex drive fit my Allen wrench snugly, no wobble at all.

Finally got around to using these for a precise mechanical adjustment, and the hex socket drive made it easy to torque them into a tight spot without slipping. The zinc plating seemed durable and gave them a clean look.