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The BSA A7-A10 Forum
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plunger tube thread size
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Topic: plunger tube thread size (Read 160 times)
Adtrac
Moving Up
Join Date: Mar 2023
Posts: 34
Karma: 1
plunger tube thread size
«
on:
04.10. 2024 05:35 »
I am wondering if someone would be able to tell me the internal thread pitch and size on a BSA A10 Plunger tube , ie where the caps screw into .
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SA hopefully getting a 53 A10 GF
MikPowl
A's Good Friend
Join Date: Feb 2014
Posts: 65
Karma: 0
Re: plunger tube thread size
«
Reply #1 on:
04.10. 2024 09:45 »
Measuring the threaded boss on my plunger column fit/remove tool, the thread guage says 20tpi pitch. Eyeball measurement against a ruler puts the size of the boss at 7/8".
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muskrat
Global Moderator
Wise & Enlightened
Join Date: Jul 2009
Posts: 11021
Karma: 132
Lithgow NSW Oz
Re: plunger tube thread size
«
Reply #2 on:
04.10. 2024 20:58 »
G'day Adtrac.
Mik is correct.
https://stainlessclassics.co.uk/product/bsa-plunger-suspension-top-cap/
Cheers
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'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7
limeyrob
Resident Legend
Join Date: Nov 2023
Posts: 861
Karma: 4
Re: plunger tube thread size
«
Reply #3 on:
04.10. 2024 21:05 »
Interesting that you can get taps and dies:
https://www.tracytools.com/product/7-8-x-20-tpi-bsc/
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Slough 59 GF/SR
Rex
Wise & Enlightened
Join Date: Apr 2017
Posts: 1694
Karma: 8
Re: plunger tube thread size
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Reply #4 on:
04.10. 2024 21:16 »
Tracy do a lot of very obscure stuff to be fair.
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muskrat
Global Moderator
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Join Date: Jul 2009
Posts: 11021
Karma: 132
Lithgow NSW Oz
Re: plunger tube thread size
«
Reply #5 on:
04.10. 2024 21:32 »
G'day Rob.
I got a 1/4, 5/16, 3/8 set off them probably 30 odd years ago.
Cheers
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'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7
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The BSA A7-A10 Forum
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Technical (Descriptive Topic Titles - Stay on Topic)
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plunger tube thread size