Thread: Am I being dumb ?
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02-12-2016 #1
I bought some :
BLACK MALLEABLE IRON REDUCING PIPE FITTINGS BSP - SOCKET, BUSH, TEE, HEX NIPPLE
( 111520014759 )
Fitting Type: REDUCING BUSH
Size: 1/2" x 3/8"
When they arrived I was surprised my 3/8" male threaded pipe didn't fit ?
So I emailed the vendor and said although you have 1/2" to 3/8" stamped on the Bush its actually measures 14.1 which I think is 9/16 0.5625 or 14.2875mm well near enough.
Anyway I emailed the guy and this was his reply
hi David, there is no such size as 9/16" , the fitting is correct just check . (there is sizes cast on fitting one side of hex part)
1/2" X 1/4" bushes have a inside 11mm if any better for you.
Here's me thinking 1/4" was 6.35mm ?
I'm confused
Pic attached
As Robin has stated an interest in "having fun" I withdraw my earlier request...your all now free to continue with lessons and raucous finger pointing !! :P
Last edited by Fivetide; 02-12-2016 at 04:56 PM.
Fiction is far more plausible when wrapped around a thread of truth
Nothing great was ever achieved without enthusiasm.
Ralph Waldo Emerson
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02-12-2016 #2
Hi there,
they have sent you a 3/8 fitting, the fractional inch number refers to the inner diameter of tube that would have once screwed in the fitting(back when pipe was made slightly thicker)
confusing isnt it!
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02-12-2016 #3
Ah bsp claims another victim! :-/ :-(
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02-12-2016 #4
Last edited by Fivetide; 02-12-2016 at 04:49 PM.
Fiction is far more plausible when wrapped around a thread of truth
Nothing great was ever achieved without enthusiasm.
Ralph Waldo Emerson
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02-12-2016 #5
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02-12-2016 #6
Could you clarify what you are trying to fit to what? Somehow from what you've said you I don't think that you will find an off-the-shelf fitting but if we know what's needed it will be easier to advise. For example, is your "normal everyday 3/8" thread" UNC, UNF, BSF, BSW? Not to mention the finer threads in the ME series... Or maybe nearest metric size? It's all a bit of a rat's nest
BTW, I don't know of any thread where measuring the inside of the thread (as per your picture) will give you a recognisable dimension. Usually threads are measured over the outside - in effect, the diameter of the rod that an external thread was cut on. You can use internal diameter to find actual thread size but you will need to know what you are looking for in thread tables (possibly core size, give or take a bit of clearance).
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02-12-2016 #7
https://mdmetric.com/tech/thddat7.htm
Major and minor diameters plus all the other dimensions you could need ;-)You think that's too expensive? You're not a Model Engineer are you? :D
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02-12-2016 #8
Fiction is far more plausible when wrapped around a thread of truth
Nothing great was ever achieved without enthusiasm.
Ralph Waldo Emerson
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02-12-2016 #9
Have a look at https://www.bes.co.uk/products/160.asp. You might find something like an end plug you can drill and tap to your 3/8 bolt. Maybe you could just weld or braze the bolt on.
Oh the joy of BSPP BSPT and NPT. You can learn more at http://www.newmantools.com/taps/bsp.htm
Cheers,
RobLast edited by cropwell; 02-12-2016 at 07:44 PM.
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02-12-2016 #10
Fiction is far more plausible when wrapped around a thread of truth
Nothing great was ever achieved without enthusiasm.
Ralph Waldo Emerson
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