7/8-9 x 5-1/2" 六角頭螺絲 | 美國製造 | L9級合金鋼黃鋅鍍層 | 部分螺紋 (15/包)

The yellow zinc coating on these Grade L9 screws is holding up great on our assembly line, no rust after three weeks of daily use. The partial threading grabbed cleanly and the hex heads seated perfectly with a socket wrench.

I needed some seriously strong fasteners for a heavy equipment repair, and these Grade L9 bolts handled the torque without any sign of stress. The partially threaded design made alignment much easier than fully threaded ones I've used before.

These bolts are stout and the yellow zinc finish looks uniform across all fifteen. Threaded them into an existing machine frame without a single hitch, and the partial threading gave plenty of grip.