Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
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Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
Trevor Jessie
Yoda
Offline
OK, I just looked at some Smith's gauges in an online catalog and sure enough they list 5/8-18 for the connection.
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:[ I'm looking for
- Thread starter healeyboz
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OP
healeyboz
Jedi Knight
Offline
So this is exactly what I am needing as long as the thread is correct.
https://www.pegasusautoracing.com/productselection.asp?Product=1074
https://www.pegasusautoracing.com/productselection.asp?Product=1074
Dug
Jedi Trainee
Offline
Barry,
Everyone will never be in agreement that’s life. Learning along the way makes it interesting.
I am positive there are smith’s combination gauges that have BSP at some point during the manufacturing time, no question. I wonder if it’s “a” mid 50’s thing that there was a change.
Trevor, the major OD of a ¼” BSPP is 0.523 (measuring the tap itself).
I stay away from quoting the OD size of BSP.
I’d tend to measure the major diameter 5-7 threads from the large end and some would not. In tapping tapered pipe threads, I was taught to stop 5-7 threads short from full engagement of the tap and check for fit with a fitting. The rule of thumb is to check the theads for 1-1/2 to 3 threads engagement by hand before needing a wrench to seal. This surprisingly will get you very close to a gage fit (a tool inspectors use to check proper fitment,engagement).
"dug"
Threads are fun!
Everyone will never be in agreement that’s life. Learning along the way makes it interesting.
I am positive there are smith’s combination gauges that have BSP at some point during the manufacturing time, no question. I wonder if it’s “a” mid 50’s thing that there was a change.
Trevor, the major OD of a ¼” BSPP is 0.523 (measuring the tap itself).
I stay away from quoting the OD size of BSP.
I’d tend to measure the major diameter 5-7 threads from the large end and some would not. In tapping tapered pipe threads, I was taught to stop 5-7 threads short from full engagement of the tap and check for fit with a fitting. The rule of thumb is to check the theads for 1-1/2 to 3 threads engagement by hand before needing a wrench to seal. This surprisingly will get you very close to a gage fit (a tool inspectors use to check proper fitment,engagement).
"dug"
Threads are fun!
OP
healeyboz
Jedi Knight
Offline
So I talke to owner of the company that built my radiator today and he is going to pull the original that he has tomorrow. He is going to fabricate an adapter for me because I don't want to ship it back and have them fix it. Pretty nice guy!!
He said that the threads (off the top of his head) were 18mm x 1.8 or something like that .I was in the car on the way home a couldn't write it down. Any ideas as to what he was saying?
I will find out for sure tomorrow.
He said that the threads (off the top of his head) were 18mm x 1.8 or something like that .I was in the car on the way home a couldn't write it down. Any ideas as to what he was saying?
I will find out for sure tomorrow.