New Large Mouth Fuel Tank Gas Cap
Fits 50-66 M38, M38A1

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New Large Mouth Fuel Tank Gas Cap
Fits 50-66 M38, M38A1

New Replacement Fuel Tank Gas Cap

Great reproduction gas cap in the original large mouth style. Help keep your military vehicle original.

Proper vented cap with the valve inside for deep water fording.

Comes complete with rubber gasket and chain attached.

50-52 M38
52-66 M38A1

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Availability: In stock

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Questions: Is his cap vented?
Question By: Lori on Jul 22 2020 2:48 AM
Ths is an unvented cap.
Answer By: Willys Jeep Parts Tech on Jul 22 2020 5:50 AM
Questions: 1946 Cj 2a, seems to need a large mouth gas cap. Maybe tank from a different vehicle. Whats the outside diameter of the large mouth gas cap? dont want to order the wrong cap.
Question By: mark mcnally on Aug 3 2017 4:40 PM
They are 4.5" OD
Answer By: Willys Jeep Parts Tech on Aug 3 2017 9:41 AM
Questions: Does this gas cap come with a gasket or o-ring on it already?
Question By: Caden Rianda on Jun 12 2017 6:32 AM
Yes it comes complete with gasket.
Answer By: Willys Jeep Parts Tech on Jun 12 2017 5:42 AM
Questions: Are there any locking gas cap options out there for a 1953 M38A!?
Question By: Mike J on May 1 2017 4:47 PM
Sorry, there are not.
Answer By: Willys Jeep Parts Tech on May 1 2017 10:46 AM
Questions: My 1951 M38, apparently, had its tank replaced with a CJ tank (smaller filler neck) at some time in its life. Is it possible to obtain just the 4" fill neck to have a shop weld that in place and properly adapt this tank to my military-spec vehicle? Would your tank supplier be willing to sell that important part separately through you?
Question By: Rick Williams on Jul 21 2016 5:25 PM
Sorry, you cant get just a spout for it. You would have to fabricate that locally.
Answer By: Willys Jeep parts tech on Jul 21 2016 10:28 AM
Questions: What are the measurements of the gas cap?
Question By: Darren on Sep 18 2011 12:00 AM
It is 4.5 OD
Answer By: Willys Tech on Sep 19 2011 12:00 AM