| PartNumber | D38999/20MG35PA-LC | D38999/20MG35PN-LC | D38999/20MG35PN |
| Description | Circular MIL Spec Connector 79P RCPT SZ 21 PIN WL MNT | Circular MIL Spec Connector 79P FM SZ 21 PIN WL MNT | Circular MIL Spec Connector 79P FM SZ 21 PIN WL MNT |
| Manufacturer | Amphenol | Amphenol | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | Y | Y | N |
| Number of Positions | 79 Position | 79 Position | 79 Position |
| Insert Arrangement | 21-35 | 21-35 | 21 - 35 |
| Contact Gender | Without Pin Contacts | Without Pin Contacts | Pin (Male) |
| MIL Type | MIL-DTL-38999 III | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Product | Receptacles | Receptacles | Receptacles |
| Shell Size | 21 | 21 | 21 |
| Shell Style | Wall Mount | Wall Mount | Wall Mount |
| Mounting Style | Panel | Panel | Panel |
| Termination Style | - | - | Crimp |
| Current Rating | 5 A | 5 A | 5 A |
| Contact Plating | - | - | Gold |
| Contact Material | - | - | Copper Alloy |
| Series | D38999 III | D38999 III | D38999 III |
| Packaging | Bulk | Bulk | - |
| Mounting Angle | Straight | Straight | Straight |
| Brand | Amphenol Aerospace | Amphenol Aerospace | Amphenol Aerospace |
| Shell Plating | Electroless Nickel | Electroless Nickel | Nickel |
| Mating Style | Self Locking | Self Locking | Self Locking |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Qualification | EREL | EREL | EREL |
| Shell Material | Aluminum | Aluminum | Composite |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | 38999 | 38999 |
| Part # Aliases | 91-578897-35G | 91-578897-35P | 91-578867-35P |
| Unit Weight | - | 1 oz | 1.235312 oz |