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Pauxier
First Officer
Flight distance : 1213238 ft
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United States
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Does any one know what the thread size is for the two holes on the right side of the Ultra Bright?
There's one on the top and one on the bottom.

They are not the standard size for mounting camera/mount things.  (1/4-20 UNC )

2018-4-2
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Normanby
Second Officer
Flight distance : 136601 ft
Australia
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I have the 7.85 inch standard (not Ultra Bright) Crystalsky but I expect the chassis and hole sizes would be the same. The mounting bracket which fits on the lower side of my crystalsky uses the two threaded holes in that side. I took one of the screws out and it fits well in the two holes on the right side. Took the screw over to my workshop and measured it. The diameter is 5.0mm and the thread gauge shows 0.8mm pitch, so it seems to be a metric thread (5/0.8)mm. Not sure if this is a standard metric thread. The nearest inch size is 3/16 but none of the TPI gauges fitted properly. Hope this is some assistance.
2018-4-2
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Pauxier
First Officer
Flight distance : 1213238 ft
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United States
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Wow thanks for that detailed answer. I don't have those measuring instruments.
2018-4-2
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