براغي رأس سداسي ثقيل 5/8-11 × 5 بوصة | فولاذ سبائكي ASTM A193 B7 عادي | ملولبة جزئيًا (80 / عبوة)

Installed these on a pump baseplate and the 5/8-11 threads cut smoothly without any binding. The partial threading made it easy to get the right clamp force on the flange without bottoming out.

The threads are clean and consistent across all 80 screws, which made assembly faster than I expected. These hex cap screws feel solid for heavy-duty use.

I bought these for a machinery repair and the partially threaded design made alignment much easier on the flanged joint. The threads are clean and caught smoothly right from the start with no binding. So far they’re holding torque better than the old grade 5s I replaced.