Threads for the oil pressure switch on MFS4/5/6 or NSF4/5/6

[km1125]

I have a Nissan NSF5A and looking to hook a pressure gauge up in place of the oil switch to see what the pressure is at hot idle. I'm getting an intermittent stall and the last couple times I saw the oil light blinking as it was starting to die. I'm wondering if it's a switch issue or an actual oil pressure issue. I thought about just putting a toggle switch on the wire to test but if the pressure is really getting marginally low I want to know about it.

Anyone know the threads that are needed so I can pick up the right adapters before I get to the marina?

 

[pvanv]

I haver a kit, with gauge, so not 100% sure, but 1/8 npt might work.
The led may be flashing due to low rpm when stalling.