I've got sensors for my megasquirt unit, I'm after a couple of nuts that I can weld in place for the sensors to sit in. The thread I need is 3/8 NPT (American National Pipe Thread) :/

Firstly why is it called 3/8 (which is around 10mm isn't it?) when the thread I need is closer to 17mm? secondly, where can I get a couple of these nuts?

Pipe thread sizes refer to the bore of the pipe on which they are designed to be used.

Sure someone can knock you some threaded bosses up.

had a similar question the other day, the 3/8" refers to the i.d of the pipe its supposed to fit with.

sorry, thats a terrible description. i'll try again later if someone else doesn't get there first...

Use a 3/8" NPT tee piece and cut it up. You'll have three bosses then!

3/8" NPT is a tapered thread.
You really need to use a 3/8" NPT tap to tap a weld in boss.

quote:

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Originally posted by owelly
Use a 3/8" NPT tee piece and cut it up. You'll have three bosses then!

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U2U me your address and I'll send you one.

And for info, the female part of a tapered thread isn't tapered. The male part is.

quote:

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Originally posted by owelly
U2U me your address and I'll send you one.

And for info, the female part of a tapered thread isn't tapered. The male part is.

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It looks a bit tapered but it's hard to tell










[Edited on 29/6/09 by Benzine]

If thats for MS and the std vauxhall senders then they are indeed 3/8NPT

I can make you some if you still need them.

Let me know what material etc you want them made from and I will see what I can do.