This is a NEW US MADE military M-series gas cap. This fits the large mouth military fuel tanks. This has the internal valve for the fording system. These are made by a US Military contractor here in the US. We get the over runs from the completed contracts. That means our supply is very limited and we get in odd numbers. These will fit the M38, M38A1, M170, M151, M715, M37, and many other of the larger trucks.
Part number: CD2616, MS35645-1
This has a different part number per application but is the same cap.