Practically Classics Forum

Posted: **Fri Nov 09, 2012 8:34 am**

Is this 3/8"?

I'm counting 8 threads per half inch.

Posted: **Fri Nov 09, 2012 10:43 am**

I would say 3/8 UNC. UNC is 16 TPI, BSF 20 and UNF 24

Posted: **Fri Nov 09, 2012 11:59 am**

I've no idea regarding the answer, but may I just say that's a very good photo! Couldn't be clearer.

What is it for?

Cheers!

Posted: **Fri Nov 09, 2012 1:27 pm**

I can recommend a Zeus Book for things like this - http://www.tooled-up.com/Product.asp?PI ... tAodUBYAkw.

Posted: **Fri Nov 09, 2012 1:53 pm**

I can't resist any more.
It doesn't matter what thread it is, it's screwed.

I'll get my coat.

Posted: **Fri Nov 09, 2012 4:26 pm**

TerryG wrote:I can't resist any more.
It doesn't matter what thread it is, it's screwed.

I'll get my coat.

You really are Nuts!

Posted: **Fri Nov 09, 2012 4:28 pm**

You'd better make a bolt for the door

Posted: **Fri Nov 09, 2012 5:09 pm**

I'm guessing that it's for an oil gallery as it's tapered in a very similar way to the one on the right of this pair. (Excuse the shadow, phone camera LED flash couldn't quite get in about at the edge of the left one):

Posted: **Fri Nov 09, 2012 9:25 pm**

What is it for, most kind of oil fitting or gauges and the like will be BSP. or BSPT

Posted: **Fri Nov 09, 2012 9:44 pm**

It is tapered isn't it? Looks like an oil pressure sender to me, the pot type that goes with a remote instrument head. Same thread as the one I posted if you count the threads, and that's to fit a capillary to a Saab/Triumph IL4 or V8 oil pump.

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