TERMINAL,AMPOWER 500MCM 3/8 Wire Size: 228 – 278 mm² Wire Size: 450000 – 550000 CMA Stud Size: 3/8 Stud Diameter: 9.91 mm Stud Diameter: .39 in Ampower Terminal & 2 Stud Hole | 228 – 278 mm² 450000 – 550000 CMA 3/8 9.91 mm | Part Number: 326808-3 | Internal Number: 326808-3 | .39" | TE Connectivity