balidey
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| posted on 27/10/10 at 12:00 PM |
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OT help large fine thread identification
Help.
I have a thread on a large drum / tank that I need to copy. As far as I can see its not a 'standard' thread but would love to be proved
wrong.
OD is approx 60mm, thread pitch is approx 2mm. The thread does not taper. its not 1.25" its not 1.5"
Anyone have any ideas what it is?
Dutch bears have terrible skin due to their clogged paws
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liam.mccaffrey
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| posted on 27/10/10 at 12:06 PM |
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Is it definitely an imperial thread and not a metric 60mm thread with a 2mm pitch 
Take a few different fasteners and hold them against the thread for a quick and dirty thread gauge. If they are the same pitch they will sit snugly
with no gap.
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nick205
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| posted on 27/10/10 at 12:15 PM |
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What's the tank for - might give a clue as to what the fitting is?
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Jimbob
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| posted on 27/10/10 at 12:30 PM |
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2" BSP has a nominal thread size of 2.347"(59.6mm) and 11 threads per inch(2.3mm pitch)
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liam.mccaffrey
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| posted on 27/10/10 at 12:34 PM |
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if its in a tank could very well be bsp
good call jimbob
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balidey
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| posted on 27/10/10 at 12:43 PM |
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Could be 2" BSP. We originally thought it was a metric equivalent, if such a thing exists?
Its for a steel diesel tank on an artic trailer.
Dutch bears have terrible skin due to their clogged paws
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Alan B
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| posted on 27/10/10 at 03:52 PM |
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Or 2" NPT which is 11.5 Threads per inch...possible answer if the tank originated in the US or Canada...just a thought
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balidey
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| posted on 27/10/10 at 04:38 PM |
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Just got a (kind of) answer from the tank supplier. It comes from France and its a Metric M60, but they are getting back to me about the actual thread
pitch, ie is it an M60 Fine.
Dutch bears have terrible skin due to their clogged paws
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Mal
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| posted on 27/10/10 at 05:24 PM |
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BSP threads are considered to be a part of the current system of metric threads, despite its origins.
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