Radiator Drain Cap

[joe1383]

1959 Ford Workmaster 601
Replaced radiator in Oct ‘23. Somehow my radiator cock drain plug fell out somewhere. Ran to Rural King to get another 1/4” npt and I cannot get it to start the thread. Any suggestions? Almost like it’s just a micron too big.

 

[DoubleO7]

Replaced radiator in Oct ‘23.

Likely made in a foreign country and maybe not NPT at all.

I would be contacting the seller to find out what it takes.

Do you have any other 1/4NPT or even 1/8NPT it that you could try in the hole to confirm or deny fit?

 

[wore out]

1959 Ford Workmaster 601
Replaced radiator in Oct ‘23. Somehow my radiator cock drain plug fell out somewhere. Ran to Rural King to get another 1/4” npt and I cannot get it to start the thread. Any suggestions? Almost like it’s just a micron too big.

New radiator was likely made overseas and drain cock port MAY be BSP or some sort of metric thread.

Perhaps it could be "touched up" with the careful use of a 1/4" pipe tap?

 

[Texasmark]

New radiator was likely made overseas and drain cock port MAY be BSP or some sort of metric thread.

Perhaps it could be "touched up" with the careful use of a 1/4" pipe tap?

That could work then apply a good dose of Teflon tape to the threads to seal up the open areas where the old threads in the radiator don't mesh with the threads of the new plug.