"Source: Merriam- Webster Online. NORSOK CAD Symbol Libraries, Z-004: PFI015" . "Recorded" . "SWIVEL JOINT" . "SWIVEL JOINT" . "RDS5813402" . "An artefact joining two parts so that one or both can pivot freely (as on a bolt or pin)" . "u82237" . "1999.10.14" . .