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Smiths PA screw size
#4
Howard, here is a chart that gives diameters of most of the available BA sizes. I suppose it is possible that Smiths may have cut their own threads, but I doubt they would have done that. Sizes of BA go up(down) to the smallest at 25BA, which I'm not sure my old eyes could even see.

Erich in Seattle

https://maccmodels.co.uk/ba-size-chart/
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Messages In This Thread
Smiths PA screw size - by Howard Wright - 02-09-2020, 01:52 PM
RE: Smiths PA screw size - by Erich - 02-09-2020, 05:00 PM
RE: Smiths PA screw size - by Howard Wright - 02-09-2020, 05:36 PM
RE: Smiths PA screw size - by Erich - 02-09-2020, 06:14 PM
RE: Smiths PA screw size - by Howard Wright - 02-09-2020, 06:18 PM
RE: Smiths PA screw size - by Bob Culver - 02-09-2020, 08:47 PM
RE: Smiths PA screw size - by Parazine - 02-09-2020, 08:48 PM
RE: Smiths PA screw size - by Stuart Giles - 03-09-2020, 07:38 AM
RE: Smiths PA screw size - by Zetomagneto - 03-09-2020, 09:27 AM
RE: Smiths PA screw size - by Howard Wright - 03-09-2020, 01:50 PM
RE: Smiths PA screw size - by Erich - 04-09-2020, 01:12 PM

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