| 285 / | HD | PIPE JOINTS OR COUPLINGS |
| FOR 100 | DF | SYSTEMS (285/120) {11} |
| FOR 111 | DF | .~ Plural noncommunicating paths (285/131) {4} |
| FOR 113 | | .~.~ Concentric (285/133.1) {2} |
| FOR 114 | DF | .~.~.~> Having suspension means (e.g., oil well head type, etc.) (285/133.2) |
| FOR 115 | DF | .~.~.~> With relative motion (e.g., drier drum type) (285/134) {1} |