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Rubber washers

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Rubber washers
David Stepney Offline
Cantankerous Welsh Hermit
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Joined: Jan 2019 Posts: 1,573 Threads: 21
Reputation: 14
Location: Bala North Wales
Car type: 1933 RP Standard Saloon
#21
27-04-2019, 03:55 PM
BSP thread sizes are a bit weird. The size relates to the internal diameter of the(steel) pipe it was intended to secure. For instance, a 1/4" BSP union is intended to secure a pipe with 1/4" I.D. Modern piping is thinner walled, so the comparison doesn't quite work, but hope this helps.
And yes, I am old enough to remember when the metric invasion!
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dickie65 Offline
Senior Member
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Joined: Aug 2017 Posts: 747 Threads: 13
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#22
28-04-2019, 08:07 AM
I am with the Great Bearded One.
I use Dowty washers on my carb / fuel pump inlet and outlet / sump plug and back axle plug.
They seal with much less torque than fibre or copper washers.
Available from most Hydraulic pipe suppliers. I am sure they are specified by the pipe fitting size rather than ID.
Austins like Imperial non EU sizes !!!
Self centering ones are the best for our application.
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