D38999/20FJ24AE vs D38999/24MC35JA-LC
| Part Number |
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| Category | Circular Connectors - Housings | Circular Connectors - Housings |
| Manufacturer | TE Connectivity Deutsch Connectors | TE Connectivity Deutsch Connectors |
| Description | CONN RCPT HSNG MALE 24POS PNL MT | CONN RCPT HSG FMALE 22POS PNL MT |
| Package | - | - |
| Series | Military, MIL-DTL-38999 Series III, DTS | Military, MIL-DTL-38999 Series III, ACT |
| Type | For Male Pins | For Female Sockets |
| Mounting Type | Panel Mount | Panel Mount |
| Ingress Protection | Environment Resistant | Environment Resistant |
| Orientation | E | A |
| Number of Positions | 24 | 22 |
| Mounting Feature | Flange | Bulkhead - Front Side Nut |
| Connector Type | Receptacle Housing | Receptacle Housing |
| Shielding | Shielded | Shielded |
| Contact Type | Crimp | Crimp |
| Shell Size - Insert | 25-24 | 13-35 |
| Fastening Type | Threaded | Threaded |
| Shell Size, MIL | J | C |
| Contact Size | 12 (12), 16 (12) | 22D |
| Shell Material | Aluminum Alloy | Composite |
| Housing Color | Silver | Silver |
| Shell Finish | Electroless Nickel | Electroless Nickel |
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1. What is a circular connector housing?
A circular connector housing is a structural component used to protect internal connectors and cables, typically providing mechanical support and environmental sealing to prevent dust, water, chemicals, or physical damage.
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2. What are the common materials for circular connector housings?
Common shell materials include metal (such as aluminum, stainless steel) and plastic. Metal casings typically have better shielding and corrosion resistance, while plastic casings are lightweight and suitable for applications that do not require shielding.
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3. How to choose a suitable circular connector housing?
When choosing a casing, the following factors need to be considered:
Application environment (indoor, outdoor or industrial environment)
Protection level
Connector type and specifications
Required shielding performance
Materials and corrosion resistance performance -
4. Does the circular connector housing have shielding function?
Some metal casings provide electromagnetic shielding (EMI/RFI) for high-frequency signal transmission applications to prevent electromagnetic interference.

