7/16-14 X 1-3/4" 六角頭螺絲 | 美國製造 | L9級合金鋼黃鋅 | 部分螺紋 (50/包)

The threading is clean and the yellow zinc coating looks durable, so these should handle heavy use without rusting. I used them to secure a jig on my mill, and the Grade L9 strength gives me confidence they won't strip under torque.

I needed bolts that could handle high torque without stripping, and these Grade L9 screws have way more bite than the hardware store stuff I used before. The hex head grips my socket perfectly, no rounding.

The yellow zinc coating is consistent across all fifty and the threads are clean, so they seated smoothly with a socket. I used a dozen on a steel frame and the L9 alloy feels seriously tough, no stripping or galling on the partially threaded section.