Spark plugs with 3/16 x 40 thread.

[Bruno Mueller]

Guys, I am looking for a delivery address for spark plugs with 3/16 x 40 thread.

 

[stevehuckss396]

Same as #10-40. Rimfires are out there somewhere. I think the Chinese are making them now also.

 

[SmithDoor]

Guys, I am looking for a delivery address for spark plugs with 3/16 x 40 thread.

Try Ebay
It hard one use model engines in 1930 to late 1950’s. The it was all glow plug with think is a odd size ¼" . There maybe 3/16" glow plug that with some work could be a spark plug.

It can be hard one to find

I would try what

stevehuckss396
Model Engineer Project of the Month Winner HMEM Supporting Member
Today at 5:17 PM
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#2
Same as #10-40. Rimfires are out there somewhere. I think

and modify to fit.

Dave