5/8-18 X 2-1/4" 六角頭螺絲 | 美國製造 | PFC9 合金鋼黃鋅 (25 / 包)

These hex bolts threaded in perfectly on my milling machine’s rotary table, and the yellow zinc coating looks clean and corrosion-resistant. The 5/8-18 threads were sharp and consistent across all 25 pieces, which I appreciate for a precise fit.

I needed these for a heavy-duty press repair and the threads were clean and consistent right out of the package. The yellow zinc coating seems thick and even, should hold up well in the shop environment.

I needed some heavy-duty bolts for a piece of farm equipment and these hex heads cinched down tight without stripping. The alloy steel feels plenty strong, though one screw had a tiny burr on the threads. Still, for 25 pieces made here, it’s a solid deal.