Thread of a Series III oil pressure guage sender unit?

[KevinNY]

Can anyone provide this? Not the smaller warning light sender but the big doorknob sender for the Smiths pressure guage.

[57109]

I'm pretty sure it's 3/8 20 BSF. I'll check tomorrow.
Regards
Gord'n

[KevinNY]

Thanks, I was thinking BSPP was more likely. Let me know if you find it.