6420-005E 2/0 GA 5/16" Stud Straight MagnaLug® (5 Pack) - MagnaLug® are designed for heavy duty usage on trucks, buses, farm and construction equipment. These lugs are wider, thicker and longer than standard lugs. Made of 100% copper and tin plated, they are also color coded and have letter code and cable size stamped on every MagnaLug®.