Vis à tête hexagonale 5/16-18 x 2-1/2 pouces | Fabriqué aux États-Unis | Acier allié grade L9 zinc jaune | Filetage partiel (100/paquet)

The partial threading on these is exactly what I needed for clamping two steel plates without the threads chewing up the mating hole. Grade L9 with that yellow zinc finish feels like it'll hold up way better than the hardware store stuff.

The hex heads fit my socket wrench perfectly, no stripping or slipping even when torqued down on a jig fixture. For the price, getting 100 Grade L9 fasteners with that solid yellow zinc finish feels like a steal for shop use.

The yellow zinc coating on these bolts has held up perfectly in my slightly damp garage, no rust yet after a month. They thread smoothly into existing nuts without any binding, and the hex head grabs my socket wrench cleanly. Exactly the grade L9 strength I needed for a heavy-duty equipment repair.