8 mm x M14x1.5 O-Ring Thread S Series Male Stud – Alabama Industrial Products
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Liquid-O-Ring 104EU Thread Sealant for Large Threaded Connections – Safe on Plastic, High Pressure, Water Repellant, Made in The USA (5oz Brush Top Can): Amazon.com: Industrial & Scientific
Parker - Compression Tube Straight Thread Connector: 1-3/16-12″ Thread, O- Ring Face Seal/SAE-ORB - 66464587 - MSC Industrial Supply