what years were wing nuts used to hold valve covers on, our 12 has nuts and I keep pictures of every 12 t that comes up and there are no wing nuts.
According to a searchable parts list that I have, the late 11's thru 20 used studs and hex nuts.
The wing nut was only used up until the end of Calendar 1910 on the 11's.
Your 12 is correct to the best of my knowledge.
What parts books I have show none.
Rodda's "Model T Parts Identification Guide" Vol. 1, p.6 states the wing nuts were used through 1911. Sometime in early 1912 they were changed to a regular hex-nut.
Well thats great I can stop looking for wing nuts Thanks Guys Cheers Colin
My 11 is a Nov car. It has wing nuts.I agree with Richard and George. The nuts started in early 12