براغي رأس سداسي 1/2-13 × 3-1/2 بوصة | فولاذ درجة 5 أصفر زنك | خيط جزئي (150 / عبوة)

The hex heads fit my socket perfectly, and the yellow zinc finish looks like it'll hold up well against rust in my shop. These 3-1/2" bolts were just the right length for securing a heavy bracket to a steel beam.

Grabbed a box for rebuilding a press at the shop and the partially threaded design made alignment much easier than fully threaded bolts. The hex heads on these grip a wrench nicely without rounding.

Needed these for mounting a new motor to a baseplate, and the partially threaded design saved me time on alignment. The yellow zinc seems evenly coated so far, though a few heads had slight tooling marks.