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| Part Number | D38999/20JJ20BN | 
| Datasheet | D38999/20JJ20BN datasheet | 
| Description | CONN RCPT HSG FMALE 30POS PNL MT | 
| Manufacturer | TE Connectivity Deutsch Connectors | 
| Series | Military, MIL-DTL-38999 Series III, ACT | 
| Part Status | Active | 
| Connector Type | Receptacle Housing | 
| Type | For Female Sockets | 
| Number of Positions | 30 (23 + 4 Coax + 3 Twinax) | 
| Shell Size - Insert | 25-20 | 
| Shell Size, MIL | J | 
| Contact Type | Crimp | 
| Contact Size | 16 (13), 20 (10), 8 Twinax (3), 12 Coax (4) | 
| Mounting Type | Panel Mount | 
| Mounting Feature | Flange | 
| Fastening Type | Threaded | 
| Orientation | N (Normal) | 
| Shell Material | Composite | 
| Shell Finish | Chromate over Cadmium | 
| Housing Color | Olive Drab | 
| Ingress Protection | Environment Resistant | 
| Material Flammability Rating | - | 
| Features | - | 
| Shielding | Shielded |