براغي ذات رأس أسطواني 5/8-11 × 7 بوصة | رأس مسطح، محرك سداسي داخلي | سن جزئي | فولاذ سبائكي، أكسيد أسود حراري (10/عبوة)

I was worried about stripping the hex socket on such a big bolt, but the black oxide finish gave a solid grip—these threaded into my jig perfectly without any binding.

The hex socket drove cleanly without stripping, even at full torque on my jig base. Thread engagement was consistent down the partial length, and the black oxide held up fine without extra oil. Solid buy for the price on a 10-pack.

The black oxide finish gave them a nice, uniform look straight out of the package, and the hex socket drive seated perfectly with my Allen wrench. I've got them holding a heavy fixture together now, and the partial threading made alignment a lot easier than I expected.