براغي ضبط بنقطة كوب مقاس 1/2-13 × 3" | فولاذ سبائكي مطلي بالزنك (50/عبوة)

Used these to secure a pulley on a motor shaft, and the hex socket drive made tightening a breeze even in a cramped spot. The alloy steel feels solid and the zinc coating looks like it'll resist rust well.

The cup point bit into the shaft exactly as intended, and the zinc plating is holding up fine after a week of vibration. Threads were clean and the hex socket took a lot of torque without stripping.

I used these to secure a sprocket on a shaft, and the hex socket drive made it easy to tighten them even in that cramped spot. The zinc plating seems durable, and all fifty screws arrived intact. Exactly what I needed for the job.