| PartNumber | D38999/24FG75SN | D38999/24FG75SNLC | D38999/24FG75SN-LC |
| Description | Circular MIL Spec Connector 4P SIZE 21 JAM NUT RECEPTACLE SKT | Circular MIL Spec Connector Connectors, Interconnects - CONN HSG RCPT 4POS JAM NUT SCKT - Circular - Housings | Circular MIL Spec Connector 4P Size 24 Jam Nut Recpt Socket |
| Manufacturer | Amphenol | Amphenol | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | Y | - | Y |
| Number of Positions | 4 Position | 4 Position | 4 Position |
| Insert Arrangement | 21 - 75 | 21-75 | 21-75 |
| Contact Gender | Socket (Female) | Without Socket Contacts | Without Socket Contacts |
| 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 | Jam Nut | Jam Nut | Jam Nut |
| Mounting Style | Panel | Panel | Panel |
| Termination Style | Crimp | - | - |
| Current Rating | 46 A | - | - |
| Contact Plating | Gold | - | - |
| Contact Material | Copper Alloy | - | - |
| Series | D38999 III | D38999 III | D38999 III |
| Mounting Angle | Straight | Straight | Straight |
| Brand | Amphenol Aerospace | Amphenol Aerospace | Amphenol Aerospace |
| Shell Plating | Nickel | Electroless Nickel | Electroless Nickel |
| Mating Style | Self Locking | Self Locking | Self Locking |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Shell Material | Aluminum | Aluminum | Aluminum |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | 38999 | 38999 |
| Part # Aliases | 91-552067-ABS | - | - |
| Unit Weight | 0.035274 oz | - | - |
| Packaging | - | Bulk | - |