2.5 N/A injeector pump

I would like to know what size and thread the fuel pipe feed and return are on a 2.5 N/A injector pump.
What is currently fitted is a total bodge and fuel leaks galore. I was told 1/2inch unf but that is not correct. Also the lift pump please.
Appreciate if anyone can help.

Is it BSP? Not sure myself but would think it might be a bsp size. Shame this thread didnt come up last month as I swapped a pump on mine and could have measured it

Sam, I have measured with a vernier and it would seem to be 1/4NPT parallel.
The lift pump was easy 1/2 unf but I am still not too sure about the injector pump as I haven't got too much info on NPT. There is only one tpi difference between npt and bsp. Less than .5 of a mm on diameter. NPT is winning at the moment unless any one knows different?

just in case anyone needs to know. I have been informed by a fuel injection pump tech that they are 9/16 unf. To obtain a fitting I have found impossible so far. I have a friend with a lathe so he is going to make some out of 9/16 unf set screws.
I have tried the set screw in the thread and it fits perfectly.

I might be able to scavenge a couple, I'll have a look tomorrow but not 100% if theres unf fittings or not

Thanks,

No such luck Im afraid. Only bsp fittings

thanks for trying, what bottom hose did you use for your series with a 2.5. ?
Standard 2a or made up jobbie

Made up jobby. a length of rubber hose and a standard series with a sleeve in the middle to make up the length