AERO MS27499E14F35PC
- MIL-DTL-38999 Series III circular connector design
- 35 gold-plated electrical contacts for reliable signal transmission
- Shell size 14 with bayonet coupling mechanism
- Hermetic sealed construction for extreme environmental resistance
- Qualified to aerospace and military performance standards
In aerospace and defense systems, reliable electrical connections can mean the difference between mission success and failure. The AERO MS27499E14F35PC is a MIL-SPEC circular connector engineered to maintain signal integrity in the harshest operating conditions, from high-altitude avionics to deep-space satellite systems.
This connector combines robust mechanical design with precision engineering to deliver consistent performance through extreme temperature fluctuations, vibration, and exposure to moisture or contaminants. Its modular construction supports flexible configuration for specific application requirements, making it a versatile solution for critical aerospace electronics.
Related Products For Your Business
The AERO MS27499E14F35PC is a Shell Size 14, MIL-DTL-38999 Series II box mounting flange receptacle with insert 14-35, 37 size #20 crimp pin contacts, and polarizing position F-C. As the third member of the standard A/B/C keying triplet, it enables system integrators to mount three MS27499E14F35P receptacles side by side on the same electronics enclosure face — each uniquely keyed and physically incapable of accepting the wrong plug — without requiring any additional panel spacing or circuit labeling to prevent mis-mating. The four-hole square flange mounts entirely from the enclosure exterior without requiring internal access, making it the preferred receptacle architecture for sealed avionics LRU boxes, satellite electronics modules, and defense terminal equipment where internal access during field installation is impractical.
For comparison with related MIL-DTL-38999 Series II connectors in our inventory:
| Product | Type | Shell | Contacts | Keying | Differentiator |
|---|---|---|---|---|---|
| MS27499E14F35PC | Box Mount Receptacle | 14 | 37 | F-C | Third keying position, completes A/B/C triplet |
| MS27499E14F35PB | Box Mount Receptacle | 14 | 37 | F-B | Second keying position |
| MS27484T14F35SC | RFI Grounding Plug | 14 | 37 | F-C | Mating plug with integral 360° grounding spring |
Military-Grade Reliability & Performance
Built to MIL-DTL-38999 Revision N under Aero-Electric’s AS9100:2016-certified manufacturing program, the MS27499E14F35PC undergoes the full Series II qualification suite including 500-hour salt spray, five-cycle thermal shock from −65°C to +175°C, mechanical shock and random vibration per MIL-STD-810, and 1,500 VRMS dielectric withstanding voltage. The C keying position is fully standardized across all QPL-qualified manufacturers — an F-C keyed receptacle from Aero-Electric accepts only F-C keyed plugs from any QPL-listed supplier, preserving hardware mis-mate protection in programs where plugs and receptacles are sourced from different manufacturers across production lots. The four-hole mounting flange provides superior pull-out resistance compared to jam nut receptacles, critical for harness interfaces subject to vibration-induced connector movement or field handling stress.
Supply Chain & Quality Assurance
The MS27499E14F35PC is manufactured by Aero-Electric Connector, Inc. (Conesys), a QPL-qualified, AS9100:2016-certified connector manufacturer. Cross-source equivalents with identical keying, insert arrangement, and contact tooling are available from Amphenol Aerospace, TE Connectivity Deutsch, Souriau, ITT Cannon, and Glenair. Every shipment includes certificates of conformance, lot traveler records, and incoming inspection documentation. Inventory is stored in ESD-compliant packaging with full date code traceability per AS6081 counterfeit avoidance requirements.
Selection Guide & Application Notes
The MS27499E14F35PC completes the three-receptacle keying set for any panel zone requiring three adjacent Shell Size 14, insert 35 connectors. When specifying all three together, assign positions systematically and record the assignment in the harness design drawing and ICD to prevent substitution during rework: the physical keying is the only field-verifiable segregation mechanism once connectors are installed. For enclosure designs where the receptacle must mount from inside the panel rather than outside, specify the MS27497T14F35PC (jam nut receptacle) which uses a single-hole mounting scheme accessible from the interior. A dust cap (MS27511 type) and mounting gasket are recommended during shipping and pre-installation to protect pin contacts and seal the mounting holes against moisture ingress before the harness is connected.
FAQ
What is the role of the MS27499E14F35PC in an A/B/C keying triplet?
It is the third and final position, completing the standard three-connector mis-mate protection set. Combined with MS27499E14F35PA and MS27499E14F35PB on the same enclosure face, it ensures that three adjacent identical-footprint receptacles are each physically incompatible with the other two’s plugs, providing hardware-enforced circuit segregation without spatial separation.
Are all electrical specifications identical across the PA, PB, and PC variants?
Yes. The keying sub-variant carries no difference in electrical, environmental, or mechanical performance — all three share 37 contacts, #20 pin size, 45dB EMI shielding, −65°C to +175°C, IP67, 500-hour salt spray, and 500 mating cycles.
Which plugs mate with the MS27499E14F35PC?
Any MIL-DTL-38999 Series II plug in Shell Size 14, insert 35, polarizing position F-C — including MS27473T14F35SC (standard plug) and MS27484T14F35SC (RFI grounding plug) from any QPL-qualified manufacturer.
Is the C keying position cross-source compatible across manufacturers?
Yes. The angular offset for keying position C is defined in MIL-DTL-38999 and is identical across all QPL-qualified manufacturers. An F-C keyed plug from Amphenol, Souriau, or TE Connectivity will mate with the MS27499E14F35PC from Aero-Electric, ensuring full interoperability in cross-sourced programs.
How does the box mount (MS27499) differ from the jam nut mount (MS27497) for enclosure installation?
The MS27499 uses a four-hole square flange that bolts to the exterior enclosure face without internal access. The MS27497 jam nut receptacle mounts through a single panel hole and is secured by a nut from the inside — requiring internal access to the enclosure for installation. Box mount is preferred for sealed units; jam nut is preferred where single-hole cutouts are mandated by panel layout constraints.
What accessories are recommended for the MS27499E14F35PC?
A dust cap (MS27511 type) protects pin contacts when unmated. A mounting gasket between the flange and enclosure face seals the four mounting holes against moisture ingress. A SAE-AS85049 backshell on the mating plug provides cable strain relief. For EMC-critical applications, specify an RFI grounding plug variant (MS27484T14F35SC) to supplement the 45dB connector-level EMI shielding with integral 360° cable shield bonding.
