براغي رأس سداسية 5/8-11 × 5-1/2 بوصة | فولاذ درجة 8 مطلي بالزنك | بخيط جزئي (75/عبوة)

Put these on a heavy-duty trailer hitch build and the grade 8 hardness made torquing them down to spec feel solid. The partial threading was just right for clamping the spring plates without bottoming out.

These hex heads grabbed cleanly with my socket wrench, and the 5-1/2" length was just what I needed for a heavy machinery repair. They feel solid and the partial threading helped seat them perfectly against the frame.

The zinc plating on these grade 8 bolts looks clean and even, and they threaded smoothly into my ag equipment without any binding. I used a socket for the hex head and it gripped perfectly.