3/4-10 X 5-1/2" 六角頭螺絲 | 美國製造 | PFC9合金鋼黃鋅 (20個/包)

Threaded these into an old milling machine I’m rebuilding, and the hex head seats perfectly with a socket. The yellow zinc coating looks like it’ll hold up well in the shop, and the threads were clean right out of the package. Exactly what you’d expect from US-made fasteners.

Used these to mount a heavy-duty press brake to the shop floor, and the yellow zinc coating held up well against the gritty environment. The hex head gave my 1-1/8" socket a solid grip without any stripping.

These bolts threaded perfectly into my excavator’s track link without any binding, which was a relief. The yellow zinc coating looks even more durable than I expected for industrial use.