Ace Race Parts 26065 -16AN Female Weld Bung - 304 StainlessAce Race Parts 26065 16AN Female Weld Bung 304 Stainless The Ace Race Parts brand of 16AN Female ORB AN Weld Bungs are precision CNC machined from 304 Stainless Steel and feature a stepped design for added weld strength and durability. Ace Race Parts line of Female ORB Weld Bungs are available in sizes ranging from 4AN to 20AN and are suitable in high pressure applications, like fuel systems, fuel cells, oil tanks, and other custom applications.