براغي رأس سداسي 1/4-20 × 1-3/4 بوصة | درجة 5 فولاذ زنك أصفر | ملولبة جزئيًا (200/عبوة)

Used these on a small tractor attachment where vibration is always an issue, and the partial threading let me get a solid bite without bottoming out. The yellow zinc finish still looks new after a few months outside.

The hex heads on these grade 5 bolts fit my socket perfectly without slipping, and the yellow zinc finish looks clean and uniform. Used them to reassemble a small press, and the partial threads made alignment much easier than fully threaded bolts.

These hold up great under torque from my impact wrench. The yellow zinc finish seems to be doing its job preventing rust so far on the gear I've repaired.