7/8-9 X 3-1/2" 六角頭螺絲 | 美國製造 | PFC9合金鋼黃鋅 (10 / 包)

The yellow zinc coating on these bolts hasn't chipped at all during a recent machine repair project, which I appreciate. Thread engagement was smooth and consistent all the way down the full 3-1/2 inch length.

Used these to bolt down a heavy-duty press in my shop, and the yellow zinc finish on the heads shows no sign of rust even after a few weeks in a damp garage. The 3-1/2 inch length gave me just enough thread engagement through the steel base plate without bottoming out, which was a relief. Solid, pre

Threads are clean and the hex head grabs a wrench without slipping, which matters when you're torquing these down on a press. Used a full box on a frame repair and every one seated perfectly. For a ten-pack of this grade, that's exactly what I needed.