Ti Hex Flange 5/16-18 x 1.250 Bullet Nose Min.UTS160Ksi. This bolt has 1 1/4" of thread and a 1/4" long bullet nose so that you can start the nut easier. The flange has a diameteter of .465 and it has 5/16" hex. These are made for Kart and Quarter Midget wheel studs.