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| PartNumber | D38999/20FH53SA-LC | D38999/20FH53SB | D38999/20FH53SA |
| Description | Circular MIL Spec Connector 53P Sz 23 Wall Mount Pin Receptacle | Circular MIL Spec Connector DTS 53C 53#20 SKT R ECP | Circular MIL Spec Connector |
| Manufacturer | Amphenol | TE Connectivity | Glenair |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | N | Y | - |
| Number of Positions | 53 Position | 53 Position | 53 Position |
| Insert Arrangement | 23-53 | 23 - 53 | 23 - 53 |
| Contact Gender | Without Socket Contacts | Socket (Female) | Socket (Female) |
| MIL Type | MIL-DTL-38999 III | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Product | Receptacles | Receptacles | Receptacles |
| Shell Size | 23 | 23 | 23 |
| Shell Style | Wall Mount | Wall Mount | Wall Mount |
| Mounting Style | Panel | Panel | Panel |
| Termination Style | - | Crimp | Crimp |
| Contact Plating | - | - | - |
| Contact Material | - | - | - |
| Series | D38999 III | D38999 Series III | - |
| Mounting Angle | Straight | - | - |
| Brand | Amphenol Aerospace | TE Connectivity / DEUTSCH | Glenair |
| Shell Plating | Electroless Nickel | Nickel | Nickel |
| Mating Style | 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 | D38999 | - |
| Unit Weight | 1.645691 oz | 0.035274 oz | 2.706379 oz |
| Current Rating | - | 7.5 A | 7.5 A |