HOLO-KROME 32226 براغي مقبس نقطة الكوب 1/2-13 X 1-1/2" | سبيكة فولاذية أكسيد أسود حراري (50 / Pkg.)

These set screws bit into the shaft perfectly thanks to the cup point design, holding firm without any slipping during assembly. The black oxide finish gave them a nice, uniform look and seemed to resist corrosion well right out of the package. Exactly what I needed for a reliable clamping job.

Had to swap out some cheap screws on a lathe project where a cup point was slipping; these threaded in smooth and the black oxide finish looks factory-tough. They're definitely holding tighter on the shaft than the old ones did.

These set screws are super beefy and the black oxide finish looks like it'll hold up well in my shop. The cup point really bites into the shaft, giving me a solid lock on a heavy-duty sprocket I was mounting.