مسامير ذات رأس سداسي 5/16-24 X 3" | صناعة أمريكية | درجة L9 فولاذ سبائكي مطلي بالزنك الأصفر | خيط جزئي (100 / علبة)

The yellow zinc finish is holding up well so far, and the partially threaded design made installing them into our assembly frame much easier than fully threaded bolts. These L9 alloy steel screws feel seriously tough.

I needed 5/16-24 bolts for a jig I was building, and these Grade L9 steel screws drive smoothly with a socket. The yellow zinc coating looks clean and should resist rust in my shop.

The threads are clean and the yellow zinc coating looks uniform across all 100, so they should hold up fine on the equipment assembly line. I’ve used cheaper imported bolts before and these are noticeably more solid when torquing down with a socket.