*** IN STOCK SHIPS TODAY *** This stud is made from heat treated steel and is black oxide finished with a nice lead on so you can just set the nut on the stud and hit it with your speed wrench and the nut will spin right on without fear of cross threading saving time for between round maintenance. Studs are sold separately and are 5/16-18 x 5/16 -24 x 1.40" or 1.640" long with starter end.