I just picked up an old square number Smiths impulse tachometer. It is missing the nuts for the mounting studs and I'm having a hard time figuring out the correct thread size.
An 8-32 seems like it wants to start but only goes a turn or two. As the studs are not in perfect shape I don't want to force anything.
Anyone know what the correct thread is on these studs? Metric maybe?
jack
Smiths Square Number Impulse Tachometer
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jackPDX
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iain1967s
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Re: Smiths Square Number Impulse Tachometer
I think it’s the same 3BA as the oil/temp type gauges?
See here: viewtopic.php?p=285413#p285413
See here: viewtopic.php?p=285413#p285413
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jackPDX
- Posts: 17
- Joined: Mon Oct 11, 2021 2:17 am
- Location: Portland Oregon, US
Re: Smiths Square Number Impulse Tachometer
Thank you!
Also the US links in the prior post are much appreciated.
jack
Also the US links in the prior post are much appreciated.
jack