What size plug for this prop valve?

[toofun]

Hey guys,

What size plug do I need for this shown in the pic? I am using a DISC/DISC version and pulled this off someone else's site. The front that is circled. Is it 3/8 x 24 thread?

Seems like when I try to guess I am wrong... LOL. Thanks in advance!

Mark218320

[jeff351]

I have a Wilwood prop valve and the paperwork says to plug a port use a 1/8-27 NPT pipe plug.