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Windscreen Wiper Thread

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Windscreen Wiper Thread
Rick F Offline
Still Learning
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Joined: Aug 2017 Posts: 264 Threads: 17
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Location: Deepest Norfolk
#1
26-05-2022, 12:03 PM
Does anyone know the thread of the two securing bolts on a Ruby-type windscreen wiper?
Rick

In deepest Norfolk
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AustinWood Offline
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Joined: Aug 2017 Posts: 922 Threads: 6
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Location: Scottish Borders
#2
26-05-2022, 02:58 PM
I think electrical kit tends to be odd number BA threads. Even number for mechanical.
Jim
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Bill Dixon Offline
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Joined: Aug 2017 Posts: 177 Threads: 1
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#3
26-05-2022, 05:27 PM
As far as I can remember they are 2BA.
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Parazine Offline
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Location: North Wiltshire
Car type: 1927 Chummy, 1926 Top Hat 1938 Big Seven 1/2 a Trials Chummy
#4
27-05-2022, 10:37 AM
I think they're either 3BA or 5/32" Whitworth. It's very difficult to identify these two threads positively......
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Rick F Offline
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Joined: Aug 2017 Posts: 264 Threads: 17
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Location: Deepest Norfolk
#5
27-05-2022, 11:55 AM
Thanks guys.  I have also been advised that they are 3BA by a seperate source
Rick

In deepest Norfolk
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Dennis Nicholas Offline
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Location: West/North Devon England
#6
27-05-2022, 01:09 PM (This post was last modified: 27-05-2022, 01:16 PM by Dennis Nicholas.)
3BA has 34.8 threads per inch (tpi) dia 0.161 if that helps  beware some modern/old house lighting switch boxes use very similar size screws but have significantly different threads.

Dennis

ps for older members, you will also have to purchase a good 2 stage magnifying glass as well as a screw thread gauge set  Rolleyes
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