Cam portion = Aluminum Flange portion = unplated iron Flanges are designed to mate with 150# flange Flanges have the save bolt hole pattern as an ANSI 150# flange, the thickness may vary TabsPart Finder Diameter 2” female cam3” female cam4” female cam6” female cam8” female cam Diameter 2 2” flange Finish Aluminum Cam, Iron Flange SKU: CAM2FL-F Weight: 2 lb Part Table Part Number Size Notes CAM2FL-F 2" female cam x 2" flange Flange thickness = 3/4" CAM3FL-F 3" female cam x 3" flange Flange thickness = 15/16" CAM4FL-F 4" female cam x 4" flange Flange thickness = 15/16" CAM6FL-F 6" female cam x 6" flange Flange thickness = 1" CAM8FL-F 8" female cam x 8" flange Flange thickness = 1-1/8"