Universal, AN Fitting, Female -12AN Aluminum Weld Bung (1-1/16" -12 Thread, 1-3/8" Flange OD), Female -12AN Aluminum Weld Bung (1-1/16" -12 Thread, 1-3/8" Flange OD), ALUMINUM WELD BUNGS, Vibrant Performance female AN bungs are available in both aluminum & mild steel and range from -4 to -16 AN thread sizes., -12ANFemalAlWeldBung