Marine Power - Oil Drain Plug Cap

[ktige7]

What size pipe is the cap that screws onto the hose of a 2006 Marine Power 5.7L engine?

Pic attached. Goofed up and layed it down somewhere - now I can't find it.2005 Tige 24V drain hose cap needed.jpg

[freeheel4life]

Can't say size definitely but it's for sure an NPT cap. Pretty sure its a 3/8" NPT cap. Next size down would be a 1/4" NPT. I'm definitely sure its not the size up(1/2" NPT).