براغي رأس سداسي #5/16-18 × 1-1/2 بوصة | صناعة أمريكية | درجة L9 فولاذ سبائكي زنك أصفر | ملولبة جزئياً (100/عبوة)

These bolts bit into the steel bracket with zero slippage using a standard wrench. The yellow zinc finish looks clean and the partial threading made alignment on the assembly a breeze.

I needed a full bag of partially threaded 5/16-18 bolts for a jig assembly, and these Grade L9s are noticeably stronger than the common mystery-steel ones I’ve used before. The hex heads have a consistent, snug fit with my socket, and the yellow zinc finish is clean and even.

The yellow zinc coating is even and bright, which is what I look for in fasteners that'll see some moisture. The partial threads on the 1-1/2" length seated perfectly in my equipment frame without bottoming out, and all 100 in the package measured true to spec.