Nah, I double checked and everything.
The thread on a trim pump is 7/16x24.
The thread on trim hoses is either 3/8x24 or 7/16x24 depending on the application.
For 3/8 hoses, there's a brass adaptor that screws into the trim pump.
They're all 37 degree double lipped inverted jobbes. (So not JIC, NPTF etc)