Compression seal fitting - Wikipedia
Evergreen Tools QSA 10 / 304 compression seal 1/2 inch pipe size adapter for 1 1/8 inch hole has been honored by three organizations in 2019.
QSA10/304 Compression Seal For 1/2 Pipe
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Compression Fittings
Compression fitting - DIYWiki
Seals (Mechanical): Back-Up Ring, Bodok Seal, Bridgman Seal, Bung, Closure (Container), Compression Seal Fitting, Diaphragm Seal, Dry Gas
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