I (think) I need a 1/6th BSP female fitting (or convertor to 1/8th) to fit an old speedwell oil pressure gauge but I can’t find anything available. The thread I need is very similar to 5/16th UNF, a nut will screw on well.
1/16Th Bsp
Started by
johnv
, Mar 06 2021 05:33 PM
10 replies to this topic
#1
johnv
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Posted 06 March 2021 - 05:33 PM
#2
Tones61
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Posted 06 March 2021 - 07:04 PM
Phone mini spares,they did similar for mine
#3
johnv
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Posted 07 March 2021 - 05:34 AM
Phone mini spares,they did similar for mine
Was yours 1/16th BSP? What gauge was it?
Edited by johnv, 07 March 2021 - 05:35 AM.
#4
Spider
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Posted 07 March 2021 - 08:10 AM
Does BSP go down to 1/16 ? I know NPT does, but I * think * BSP starts at 1/8.
#5
johnv
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Posted 07 March 2021 - 09:14 AM
I think I saw one 1/16th fitting for sale but it was in the US. What size could it be? Its smaller than 1/8th, and a 5/16th nut fits, but 5/16 gauge fittings don't appear to exist
#6
Spider
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Posted 07 March 2021 - 10:30 AM
1/16" NPS has a diameter very close to 5/16" but has 27 threads to the inch.
If you can measure the diameter (to +/- 0.002") and measure the thread pitch, we might be able to nail it down
#7
Shooter63
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Posted 07 March 2021 - 02:54 PM
Are you sure its 1/16th bsp, normally it would be an 1/8th, the 2 major dimensions are below
1/16th BSP .304" or 7.70mm
1/8th BSP .383" or 9.70mm
I'm not sure but I very much doubt they made their own gauges, a great company back in the day but I just can't see them tooling up for such a minor part and making the connection different from the vast majority of gauges available at the time
Shooter
1/16th BSP .304" or 7.70mm
1/8th BSP .383" or 9.70mm
I'm not sure but I very much doubt they made their own gauges, a great company back in the day but I just can't see them tooling up for such a minor part and making the connection different from the vast majority of gauges available at the time
Shooter
#8
johnv
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Posted 07 March 2021 - 03:30 PM
It's definitely not 1/8th, I have many gauges that are!
The diameter measures at 7.76mm from the top of the threads
I don't know how to measure the pitch ..
#9
smurfomatic
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#10
johnv
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Posted 08 March 2021 - 06:58 AM
Could well be! Not sure if I understand that though, the thread I have is 1/16th BSP and I want it 1/8th male or female doesn't matter as I can get a converter
#11
smurfomatic
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Posted 08 March 2021 - 08:06 AM
Could well be! Not sure if I understand that though, the thread I have is 1/16th BSP and I want it 1/8th male or female doesn't matter as I can get a converter
As far as I can understand, it takes a 1/8 male fitting and converts it to 1/16 male. They have other fittings on their site so might be worth contacting the company.
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