براغي ذات رأس أسطواني 5/8-11 × 4 بوصة | محرك سداسي | صناعة أمريكية | فولاذ سبائكي مؤكسد أسود حراريًا (140/عبوة)

The hex socket drive seated perfectly on my torque wrench, and all 140 pieces came out of the box with a consistent, even black oxide coating. I used them to bolt down a heavy jig plate and they held rock solid.

The black oxide finish on these 5/8-11 x 4" screws looks uniform and feels durable, and the hex socket drive engaged perfectly with my driver on a tooling jig. No stripped heads or wasted time, which is exactly what I need for precision assemblies.

Finally, a batch of socket cap screws that are actually perfectly threaded all the way—no frustrating burrs or binding when I'm setting up a jig. The thermal black oxide finish looks great and seems to resist any surface rust in my shop.