Where can I get this size copper washer?

[carbonarc]

The information provided suggests that the motorcycle fitting has a 7/8" BSPP thread. This thread is around 30.2 mm in diameter with a 14 tpi pitch and a 14 degree thread angle. Copper sealing rings are available for this fitting.

 

[carbonarc]

Thread angle error. it is 55 degrees

 

[Ali]

The information provided suggests that the motorcycle fitting has a 7/8" BSPP thread. This thread is around 30.2 mm in diameter with a 14 tpi pitch and a 14 degree thread angle. Copper sealing rings are available for this fitting.

I don’t think that will be the thread, it’s a Milwaukee tractor. If you look at the picture against the wood backdrop you can see the step for the sealing washer (whatever it might be made of) is offset from the thread and a mm or so larger. Thanks though.