براغي رأس سداسية 1/4-28 × 4-1/2 بوصة | فولاذ درجة 5 زنك أصفر | خيط جزئي (100 / عبوة)

The hex heads grabbed my socket wrench perfectly, and the yellow zinc finish looks sharp on the equipment frame I’m bolting together. Threads bit cleanly into the steel without any binding. These are holding up great so far.

The partially threaded design made all the difference when I had to bolt a machine guard down—the unthreaded shank gave me a solid, vibration-resistant fit without needing extra spacers. Every one of the hundred screws came out of the box clean, no burrs on the threads, and the yellow zinc finish ha

Had to tighten a heavy-duty bracket on a press and these hex heads bit into the socket perfectly without stripping. The yellow zinc finish still looks clean after a few days of oily shop use.