براغي رأس سداسي 1/4-20 X 2-3/4" | فولاذ درجة 5 زنك أصفر | ملولبة جزئياً (200 / عبوة)

Had to tighten down a piece of heavy equipment and these hex heads bit into the socket perfectly without stripping. The partially threaded section made alignment a breeze, and at 2-3/4 inches they gave just enough reach through the assembly.

Finally found hex head screws long enough for my jig fixture, and the partial threading really helped with alignment. The yellow zinc coating looks clean and should hold up well in my shop.

Used these to mount a piece of equipment to a steel frame, and the partial thread made it much easier to get a good grip with the socket. The yellow zinc finish looks clean and hasn't shown any rust after a few weeks of outdoor use.