براغي رأس سداسي 1/2-13 × 5-1/4" | فولاذ درجة 5 مطلي بالزنك الأصفر | ملولبة جزئياً (25 / عبوة)

The partial threading made all the difference for my jig setup—the unthreaded shank gives a solid bite against the plate instead of wobbling on the threads. Yellow zinc finish looks clean and hasn't shown any rust after a week of shop use, and the grade 5 rating feels plenty tough for my equipment.

These are my go-to for attaching brackets to a skid loader, and that partial thread makes all the difference for getting a snug fit without bottoming out. The hex heads grab a socket cleanly and the zinc finish has held up fine so far.

The yellow zinc coating on these is really consistent and clean. They threaded into my existing tapped holes without any binding, and the partial threading makes alignment much easier.