براغي رأس سداسي 1/2-13 × 2-3/4" | صناعة أمريكية | درجة L9 سبيكة فولاذية زنك أصفر | خيط جزئي (50/عبوة)

The threads are clean and the hex heads sat flush against my fixture plates without any binding. These L9 bolts should hold up well in the shop with that yellow zinc finish.

Needed a batch of partially threaded 1/2-13 bolts for a jig I’m building, and these threaded smoothly into the tapped holes without binding. The Grade L9 steel feels noticeably tougher than standard hardware store bolts, so I’m confident they’ll hold up under heavy use.

Yellow zinc coating looks even better in person than in the catalog photos, and the partially threaded design grabbed perfectly when I torqued them down on a jig frame. Grade L9's got plenty of bite for the heavy vibration we're seeing, no stripping issues after a week of run time.