7/8-9 x 8" 六角頭螺絲 | 美國製造 | PFC9合金鋼黃鋅（10個/包）

Installed these on a heavy-duty press and the hex heads grabbed securely with a standard socket wrench. The yellow zinc coating looks durable and should resist corrosion well in a shop environment.

The threads are cut clean and the yellow zinc coating looks uniform across all ten, so they should hold up fine in a slightly damp shop. I torqued one down to spec in a jig today and the hex head grabbed the socket without any slippage. Glad I went with the American-made PFC9 alloy for this kind of

These 8-inch hex head screws fit perfectly into my press jig, and the hex head took a socket drive without any slipping. The yellow zinc coating looks solid and the USA-made steel feels tougher than the hardware store stuff I usually buy.