mine is leaking so i need to know the plug size so i can get a new gasket

thanks all    sb

The drain plugs sold by Rock Auto are the right size. I just don't remember what the size is off the top of my head.

 

http://m.oreillyauto.com/h5/r/oap/site/c/detail/DAG0/090039/02330.oap?year=1978&make=Nissan&model=280Z&vi=1209260&ck=Search_02330_1209260_-1&pt=02330&ppt=C0023

They also have assortment of copper gaskets in the Dorman or Help section at chain stores. I found one that's copper with rubber inside for a tight seal around the threads.

Edited June 25, 20178 yr by siteunseen

Seems like a really crazy thread size.  16.4 x 1.33? Really?

Welll I confirmed that by measuring one. Crazy!  

Interesting that it's really really close to 5/8-20 TPI....

Rock Auto has a pack of 5 for $2.23...

Edited June 25, 20178 yr by zKars