Hi guys,
I got a problem and been searching but I don't know if there is any diff. in the mechanical gauge fittings over an electrical so I will re-ask. I just got an autometer water temp gauge. The sending unit they supply with the gauge won't fit completely in their adapter. I supplied a pic to show you guys what I mean.
View attachment 469268
The outside threads on the adapter are 5/16 NC 18 which appear to be the same thread as the stock sending unit. That appears to be no problem. The inside threads are 1/8 NPT 27. I tried tapping the adapter and either my tap set really sucks or brass is a pain to tap. The problem is I think the sending unit needs to be re-threaded and I can't fit the die over the unit. Does anyone have any ideas? I don't see how the sending unit can work being stuck inside the adapter? I'm clueless.
I got a problem and been searching but I don't know if there is any diff. in the mechanical gauge fittings over an electrical so I will re-ask. I just got an autometer water temp gauge. The sending unit they supply with the gauge won't fit completely in their adapter. I supplied a pic to show you guys what I mean.
View attachment 469268
The outside threads on the adapter are 5/16 NC 18 which appear to be the same thread as the stock sending unit. That appears to be no problem. The inside threads are 1/8 NPT 27. I tried tapping the adapter and either my tap set really sucks or brass is a pain to tap. The problem is I think the sending unit needs to be re-threaded and I can't fit the die over the unit. Does anyone have any ideas? I don't see how the sending unit can work being stuck inside the adapter? I'm clueless.