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[steve-l]

When using high pressure BSPP fittings either bottom or top seals are needed. If on top, the fitting will have a flange under which a sealing ring or washer is often used, They can be soft copper, teflon , aluminum or a Dowty seal. Some other BSPP threads seal in the threaded hole like for pressure gauges. They can be also be made of various materials, but it is those I want to buy. What are they called?

 

[Milacron]

Closed due to meaningless topic title