AERO MS27499E14F35PD
- 37-position female receptacle connector with box mount configuration
- Complies with MIL-DTL-38999 Series II military specifications
- Hermetically sealed construction for harsh environment operation
- Crimp termination for reliable wire connections
- Shell size 14-35 with quick-disconnect bayonet coupling
In aerospace and defense applications, reliable electrical connections can mean the difference between mission success and failure. The AERO MS27499E14F35PD connector is engineered to meet this challenge head-on, providing robust signal and power transmission in the most demanding environments. Built to the rigorous standards of MIL-DTL-38999 Series II, this connector delivers consistent performance where vibration, temperature extremes, and moisture are constant threats.
This 37-position receptacle features a box mount design that simplifies integration into avionics systems and satellite platforms. Its hermetic sealing ensures protection against dust, moisture, and other contaminants, making it suitable for both airborne and spaceborne applications. The crimp termination method provides excellent electrical continuity while allowing for efficient installation and maintenance.
Related Products For Your Business
The AERO MS27499E14F35PD 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-D. As the fourth member of the standard A/B/C/D keying set, it enables system integrators to mount four MS27499E14F35P receptacles side by side on the same electronics enclosure face — each uniquely keyed and physically incapable of accepting any of the other three plugs — without requiring spatial separation or additional circuit labeling to prevent mis-mating. This four-position keying approach is standard practice in complex avionics LRU designs and satellite equipment modules where four distinct circuit functions (primary bus, redundant bus, power, and telemetry) share a common connector footprint for BOM simplicity and tooling economy.
For comparison with related MIL-DTL-38999 Series II connectors in our inventory:
| Product | Type | Shell | Contacts | Keying | Differentiator |
|---|---|---|---|---|---|
| MS27499E14F35PD | Box Mount Receptacle | 14 | 37 | F-D | Fourth keying position, completes A/B/C/D set |
| MS27499E14F35PC | Box Mount Receptacle | 14 | 37 | F-C | Third keying position |
| MS27499E14F35PB | Box Mount Receptacle | 14 | 37 | F-B | Second keying position |
Military-Grade Reliability & Performance
Built to MIL-DTL-38999 Revision N under Aero-Electric’s AS9100:2016-certified manufacturing program, the MS27499E14F35PD passes the full Series II qualification suite: 500-hour salt spray per ASTM B117, 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 at sea level. The D keying angular offset is fully standardized in MIL-DTL-38999, ensuring that F-D keyed plugs from any QPL-qualified manufacturer — Amphenol, Souriau, TE Connectivity, Glenair, or ITT Cannon — will mate exclusively with the MS27499E14F35PD and no other keying variant, preserving mis-mate protection integrity even when components are cross-sourced across program production lots.
Supply Chain & Quality Assurance
The MS27499E14F35PD is manufactured by Aero-Electric Connector, Inc. (Conesys), a QPL-qualified, AS9100:2016-certified connector manufacturer. Full cross-source equivalents are available from all major QPL-listed Series II suppliers. Every shipment includes certificates of conformance, lot traveler records, and incoming inspection documentation with full date code traceability per AS6081 counterfeit avoidance requirements. Inventory is stored in ESD-compliant packaging.
Selection Guide & Application Notes
The MS27499E14F35PD is specified as the fourth receptacle whenever an electronics enclosure face carries four MS27499E14F35P connectors requiring complete mis-mate protection. Document keying assignments systematically in the harness design drawing and ICD — A for primary, B for redundant, C for power, D for telemetry (or as appropriate for the specific application) — and ensure that mating plugs are ordered with matching D keying: MS27473T14F35SD (standard plug) or MS27484T14F35SD (RFI grounding plug). A dust cap (MS27511 type) and enclosure face mounting gasket are recommended during pre-installation and shipping. For programs requiring cadmium-free finishes, Class T (electroless nickel) or Class Z (black zinc nickel) variants are available with identical insert arrangement and keying compatibility.
FAQ
What makes the D keying variant necessary when A, B, and C already exist?
Some avionics boxes and satellite modules carry four independent circuit interfaces using the same Shell Size 14, insert 35 connector standard. Keying positions A, B, and C protect three connectors; adding D extends full hardware mis-mate protection to a four-connector panel zone without requiring any spatial separation or additional markings beyond the keying itself.
Are all electrical specifications identical across the PA, PB, PC, and PD variants?
Yes. The keying sub-variant has no effect on electrical, environmental, or mechanical performance. All four 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 MS27499E14F35PD?
Any MIL-DTL-38999 Series II plug in Shell Size 14, insert 35, polarizing position F-D — including MS27473T14F35SD (standard plug) and MS27484T14F35SD (RFI grounding plug) from any QPL-qualified manufacturer.
Is the D keying position interoperable across all QPL manufacturers?
Yes. The angular offset for position D is defined in MIL-DTL-38999 and identical across all QPL-qualified manufacturers. Cross-sourcing plugs and receptacles of matching keying sub-variant from different suppliers is fully supported by the specification.
When should I use the jam nut receptacle (MS27497) instead of the box mount (MS27499)?
Specify the MS27497 jam nut when the enclosure design requires a single-hole panel cutout and the installer has access to the panel interior for nut tightening. Use the MS27499 box mount when the enclosure is sealed, internal access is impractical, or a rigid four-point mounting is required for high pull-out resistance under vibration and harness tension loads.
What accessories are recommended for the MS27499E14F35PD?
A dust cap (MS27511 type) protects pin contacts when unmated. A mounting gasket between the flange and enclosure face seals mounting holes against moisture. A SAE-AS85049 backshell on the mating plug provides cable strain relief, and an RFI grounding plug variant (MS27484T14F35SD) should be specified when integral cable shield bonding at the connector interface is required for EMC compliance.
