5/8-11 X 8-1/2 吋六角頭螺絲帽 | 美國製造 | 8 級鋼 黃鋅 (50 入/包)

The yellow zinc coating on all 50 screws was consistent with no flaws, so they'll resist rust well on my press. I used a socket driver and the hex heads held without slipping even at high torque for a solid mount. These USA-made Grade 8 bolts feel tough enough for heavy machinery.

Had to torque these down pretty hard for a press build and the Grade 8 steel didn't strip or deform at all. The yellow zinc coating looks nice and should hold up fine in a dry shop environment.

These bolts fit perfectly in a heavy jig I’m building, and the Grade 8 steel feels reassuringly tough under the wrench. Nice to see they’re actually made in the USA, with a clean yellow zinc finish that should resist rust.