5/8-18 X 1-3/4" 六角頭螺絲 | 美國製造 | L9級 合金鋼 黃鋅 | 全螺紋 (25 個/包)

Used these on a piece of heavy equipment that keeps vibrating things loose, and the yellow zinc finish hasn't shown a speck of wear after a month of hard use. Fully threaded, so I was able to get a solid bite even with a thick washer stack, and the hex head gripped cleanly with a socket.

The hex heads on these bolts seated perfectly in my socket without any wobble, and the yellow zinc finish is evenly applied. They threaded smoothly into a tapped hole on my press table with no binding at all.

Finally got these for a heavy-duty jig I've been building, and the Grade L9 alloy steel is noticeably tougher than the hardware store stuff. The fully threaded shaft made it easy to get the exact bite I needed without any binding. They're holding up great under torque.