1/2-13 × 3-3/4" براغي رأس مقبس | رأس مسطح بمقبس سداسي | خيط جزئي | سبيكة فولاذ معالجة حرارياً بأكسيد أسود (25/عبوة)

The black oxide finish on these screws gave them a nice, uniform look right out of the package, and the partially threaded design seated perfectly in my jig setup. They tightened down smoothly with the hex drive and held firm under load.

The black oxide finish on these screws looks professional and resisted my wrench scratches during assembly. Used them to secure a heavy steel bracket on my mill, and the partial threading gave just enough grip without bottoming out.

I needed some heavy-duty screws for a jig I was building, and these black oxide ones held up perfectly without any stripping during installation. The hex socket drive made it easy to get them tight even in a tight spot.