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Thread: Wanted: 1 3/4" BSP Tap
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9th June 2011, 05:55 PM #1
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Wanted: 1 3/4" BSP Tap
I have an aluminium fuel tank in my boat and the filler neck is deformed. The thread is 1 3/4" BSP.
I was going to use a steel pipe fitting to reform the thread, but they don't exist in 1 3/4"
Does anyone have any idea what sot of industry would use a 1 3/4" Tap? I am hoping to find a business somewhere that has one that i can pay to use for 5 minutes. I almost got lucky at a fuel tank fabricator this morning but his tap turned out to be 1 1/2"
I'm in Brisbane. Thanks
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9th June 2011, 06:36 PM #2
Pink 10EE owner
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No such thread as 1 3/4 BSP
What is the OD and tpi?
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9th June 2011, 06:40 PM #3
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maybe in your world. but there is a 1 3/4" BSP filler neck in my fuel tank...
BSP (British Standard Pipe) Thread Data BSP and BSPT taps
First table. 1-3/4" BSP - 11TPI - Major Diameter 2.116"
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9th June 2011, 07:56 PM #4
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Well well so there is such a thread... BSP Whitworth Pipe Thread DIN ISO 228 (DIN 259) Be surprised if you can find anyone with a tap though... Such an odd ball size..
If someone had a suitable lathe they could zip you up a steel thread pretty quick.. I could easily do it if you get stuck and post it down...
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9th June 2011, 09:50 PM #5
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thanks for the offer mate. much appreciated. I will PM you.
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11th June 2011, 12:14 AM #6
logic
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BSP Taps are oversized - Chances are it is actually a BSP tap. However, if it isn't then it is probabably an NPT or NPS. I will have a look around today and see if I can find something that matches your description.
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11th June 2011, 12:46 AM #7
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The catalog I ordered the new filler cap out of definately listed it as 1 3/4" BSP
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12th June 2011, 07:03 PM #8
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Someone who does hydraulics like Enzed should be able to help you out, stuff like this this is a nightmare in oz, metric or imperial all the same to some people
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28th July 2011, 11:08 PM #9
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.RC. is a legend!
so after much hunting around i could not find a 1 3/4" BSP pipe fitting or tap in Brisbane. So I took .RC. up on his offer and he sent me this:
what a piece of work!
I then milled 4 slots in the sides of the thread to make my "tap" and finally tacked an old socket in the top to allow me to connect a sliding T handle.
crossed my fingers and gave it a go
it took a lot of pressure to turn but eventually cut a nice new thread. stoked!
Thanks again richard for your help. It is much appreciated.
If anyone ever needs to clean up a similar thread the tool is available for loan for the cost of return postage.
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29th July 2011, 09:39 AM #10
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that was too easy....great work to you all
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