| 206 / | HD | SPECIAL RECEPTACLE OR PACKAGE | 
| 515 |  | STRUCTURAL FEATURES FOR NESTING IDENTICAL RECEPTACLES OR CLOSURES {4} | 
| 516 | DF | .~> With separate cushion or spacer means | 
| 517 | DF | .~> Distortable for nesting or components of "knockdown" receptacles | 
| 518 | DF | .~> Noncircular receptacles (e.g., trays) | 
| 519 | DF | .~> Having defined means to limit extent of nesting {1} |