| 439 / | HD | ELECTRICAL CONNECTORS |
|
| 611 |  | WITH VITREOUS-TYPE ENVELOPE (E.G., BASE OF LAMP OR VACUUM TUBE) {5} |
| 612 | DF | .~> Connector or contact secured to each end of double-ended envelope |
| 613 | DF | .~> Connector of the type having only concentric annular contacts or annular contact disposed concentrically about an axial contact {2} |
| 616 | DF | .~> Having bayonet-coupling contact |
| 617 | DF | .~> Plug having spaced, longitudinally engaging, prong-like contacts {1} |
| 619 | DF | .~> Having only two duplicate contacts arranged bilaterally symmetric about longitudinal axis of engagement |