14 mm spark plug Thomas Head?

[Phil Noonon]

Can anyone suggest a 14mm spark plug for the reproduction head in which the plug cap will unscrew.

Obliged!
Phil

 

[colin1928]

I use Champion the cap unscrews but it on really tight from the factory

 

[kingbee]

Phil - do you realize you're going to have to use spark plug WIRES?

 

[Phil Noonon]

will try the champion,.........was told they do not unscrew................
Yes I already have the wires, want the plugs to place the thumb nuts on.

Thanks!

 

[super flat]

I think you will find that with the new plugs the thread is different than the old nuts. Gary

 

[Bob-A]

I've got one of these heads too. I don't mean to try and swipe your thread, but I've thought about drilling and tapping for 18mm plugs!?!
Can it be done? Good idea/bad idea? I believe you can get brass thumb nuts in the newer thread size plugs. Check out eBay.

Bob-A