What is the gas cap size and thread on an oval 25 gas tank?
Thanks
Gas cap thread
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Topic author - Posts: 414
- Joined: Sun Jan 06, 2019 7:31 pm
- First Name: Tom
- Last Name: Moorehead
- * REQUIRED* Type and Year of Model Ts owned: 24 Touring, 25 Coupe,
- Location: Louisville, KY
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- First Name: Steve
- Last Name: Lang
- * REQUIRED* Type and Year of Model Ts owned: 1912 touring, 1926 speedster, 1926 TT
- Location: Mass
Re: Gas cap thread
The gas cap is a 2-1/8" x 14 TPI thread.
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- Joined: Sun Jan 06, 2019 7:21 pm
- First Name: Allan
- Last Name: Bennett
- * REQUIRED* Type and Year of Model Ts owned: 1912 van, 1917 shooting brake, 1929 roadster buckboard, 1924 tourer, 1925 barn find buckboard, 1925 D &F wide body roadster, 1927LHD Tudor sedan.
- Location: Gawler, Australia
Re: Gas cap thread
It is a fairly common size, going by the number of alternative fuel caps that will fit. These include the knobby die-cast caps from older Ford son tractors, our 205 litre oil and fuel drums, English Ford 8 and 10 hp car radiator tanks, and others no doubt.
Allan from down under.
Allan from down under.
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Re: Gas cap thread
This is a 10 gallon round gas tank on a '15 Roadster.
The mount bands, shape and size of the tank are the same as the tank on my '16 Touring.
The cap however, is the same thread as a five gallon "jerry" can.
A Jerry can cap fits perfectly. (second photo)
Yet another Model T mystery.
The mount bands, shape and size of the tank are the same as the tank on my '16 Touring.
The cap however, is the same thread as a five gallon "jerry" can.
A Jerry can cap fits perfectly. (second photo)
Yet another Model T mystery.

Respectfully Submitted,
Be_Zero_Be
I drive a Model T ... Microseconds don't matter
For every Absolute Model T Fact there are at least three exceptions.
Be_Zero_Be
I drive a Model T ... Microseconds don't matter

For every Absolute Model T Fact there are at least three exceptions.
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Re: Gas cap thread
Close but no cigar