براغي رأس سداسي 3/8-16 × 5-1/4 بوصة | فولاذ درجة 5 مطلي بالزنك الأصفر | خيط جزئي (50 / عبوة)

The partial threading makes lining up the machine bracket way easier than fighting a fully threaded bolt. I’ve used a full bag on the assembly line and every one of them threaded clean with a socket, no stripped heads or duds in the bunch.

I needed some heavy-duty bolts for a shop press repair and these grade 5 hex heads handled the load without stripping—the yellow zinc coating is a nice bonus for rust resistance.

Used these to reattach a mower deck bracket that kept shaking loose, and the grade 5 steel with the yellow zinc held up perfectly against the vibrations. The partially threaded design made it easy to get the right bite without bottoming out.