Spark Plug Thread spec

[Jasonb]

Does anyone know the thread form of 1/4" x 32 spark plug threads.

In the UK we have 1/4x32 ME which is a 55degree angle and there is also 1/4x32 UNEF with a 60degree angle.

Thanks, jason

 

[GailInNM]

It's 1/4x32 UNEF.
Gail in NM

 

[Jasonb]

Thanks