براغي رأس سداسي 9/16-12 × 4 بوصة | صناعة أمريكية | سبيكة فولاذ درجة L9 أصفر زنك | ملولبة جزئيًا (25/عبوة)

The box these came in was packed tight, and every single head is clean and free of burrs. I torqued them down on a jig without a single one stripping, and the yellow zinc finish feels properly slick.

Been using these to mount a heavy motor bracket, and the partially threaded design gives a solid bite without bottoming out. The yellow zinc finish looks tough and hasn't shown any rust after a week of exposure.

Finally got these for securing some heavy-duty brackets, and the partial threading really helped grip everything tightly without slipping. The hex heads drove cleanly with a socket, no rounding at all. Solid fasteners.