AERO MS27499E14F35PB
- MIL-DTL-38999 Series III circular connector
- 35 gold-plated electrical contacts
- Shell size 14 with bayonet coupling
- Hermetically sealed for harsh environments
- -65°C to +200°C operating temperature range
In aerospace and defense applications, reliable electrical connections are non-negotiable. The AERO MS27499E14F35PB is a MIL-SPEC circular connector designed to maintain signal integrity in extreme conditions where failure is not an option. This component meets the rigorous requirements of military and space programs, providing secure connections for avionics systems, satellite communications, and ground control equipment.
The connector's robust construction includes corrosion-resistant materials and gold-plated contacts to ensure long-term performance in high-vibration, high-shock environments. Its bayonet coupling mechanism allows for quick, secure mating while maintaining resistance to accidental disconnection. This combination of durability and reliability makes it a trusted choice for critical aerospace applications.
Related Products For Your Business
The AERO MS27499E14F35PB 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-B. Unlike wall mount receptacles (MS27472) which mount to a panel from the front, the MS27499 box mount configuration uses a four-hole square flange that bolts directly to the exterior face of an electronics enclosure — enabling secure installation without requiring internal access to the box during field mounting. This makes it the standard receptacle choice for avionics LRU boxes, satellite electronics modules, and sealed defense equipment enclosures where all connectors must be installed from outside. Class E (bright cadmium over electroless nickel) delivers 500-hour salt spray resistance across −65°C to +175°C, with IP67 environmental sealing and full fluid resistance throughout service life.
For comparison with related MIL-DTL-38999 Series II connectors in our inventory:
| Product | Type | Shell | Contacts | Keying | Differentiator |
|---|---|---|---|---|---|
| MS27499E14F35PB | Box Mount Receptacle | 14 | 37 | F-B | Enclosure face mount, no internal access needed |
| MS27484T14F35SB | RFI Grounding Plug | 14 | 37 | F-B | Mating plug with 360° grounding spring |
| MS27484T14F35SA | RFI Grounding Plug | 14 | 37 | F-A | Mating plug, adjacent keying variant |
Military-Grade Reliability & Performance
Built to MIL-DTL-38999 Revision N under Aero-Electric’s AS9100:2016-certified manufacturing program, the MS27499E14F35PB passes the full Series II qualification suite: 500-hour salt spray per ASTM B117, thermal shock across −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 box mount flange design provides a rigid, four-point attachment to the enclosure wall that is significantly more resistant to pull-out and angular loads than jam nut or wall mount alternatives — an important advantage in vibration-intensive airborne and ground vehicle environments where harness tension and vibration-induced connector movement can loosen single-point mounting solutions. The peripheral seal and individual contact grommet seals prevent moisture and fluid ingress at both the mating interface and the cable entry, maintaining IP67 protection throughout the connector’s service life.
Supply Chain & Quality Assurance
The MS27499E14F35PB is manufactured by Aero-Electric Connector, Inc. (Conesys), a QPL-qualified, AS9100:2016-certified connector manufacturer. Cross-source equivalents are available from Amphenol Aerospace, TE Connectivity Deutsch, Souriau, ITT Cannon, and Glenair — all sharing identical insert arrangement, contact tooling, and keying-compatible mating plug compatibility. Every shipment includes certificates of conformance, lot traveler records, and incoming inspection documentation with full date code traceability per AS6081 counterfeit avoidance requirements.
Selection Guide & Application Notes
The MS27499E14F35PB is the box mount variant for enclosure-face installation; specify MS27472T14F35PB (wall mount, four-hole flange, front panel installation) when the receptacle must mount to a panel rather than an electronics box exterior. The F-B keying enforces mis-mate protection against F-A keyed plugs installed on the same panel face. Mating plugs include MS27473T14F35SB (standard plug, socket contacts) and MS27484T14F35SB (RFI grounding plug, socket contacts) — specify the RFI grounding variant when cable shield continuity through the connector junction is required for EMC compliance. Accessory threads on the rear of the receptacle accept SAE-AS85049 backshells; a dust cap is recommended to protect contacts when the receptacle is unmated during installation.
FAQ
What distinguishes the MS27499 box mount receptacle from the MS27472 wall mount receptacle?
Both use the same four-hole square flange and are compatible with all Series II plugs. The MS27499 is designed for box mounting — the flange attaches to the exterior face of an electronics enclosure without requiring internal access. The MS27472 is for wall or panel mounting where the installer has access to both sides of the mounting surface.
How many contacts does the MS27499E14F35PB support?
37 size #20 crimp pin contacts per insert arrangement 14-35, rated for 500 mating cycles per SAE-AS39029. The pin contact type means this receptacle mates with a socket-loaded plug (MS27473xS or MS27484xS suffix).
Which plugs mate with the MS27499E14F35PB?
Any MIL-DTL-38999 Series II plug in Shell Size 14, insert 35, polarizing position F-B — including MS27473T14F35SB (standard plug) and MS27484T14F35SB (RFI grounding plug), plus QPL equivalents from Amphenol, Souriau, TE Connectivity, Glenair, and ITT Cannon.
Why choose Class E (bright cadmium) over Class T (electroless nickel) for this application?
Class E (bright cadmium over electroless nickel) and Class T (electroless nickel) both provide 500-hour salt spray resistance and the same temperature range. Class E offers slightly higher galvanic corrosion resistance in dissimilar metal contact scenarios and is a traditional military finish with a long qualification history. Class T is preferred where cadmium is restricted under RoHS or REACH environmental regulations; specify Class T or Class Z variants when cadmium-free finishes are required.
Can the MS27499E14F35PB be installed without accessing the interior of the electronics box?
Yes. The four-hole mounting flange is designed for exterior face installation — fasteners pass through the enclosure wall from outside, allowing the receptacle to be mounted, secured, and connected entirely from the front without opening the electronics box. This is the primary design advantage of the box mount configuration for sealed avionics and satellite units.
What backshell and accessories are required?
Accessory threads on the rear of the MS27499 accept SAE-AS85049-compliant backshells for cable strain relief. A dust cap or protective cover (MS27511 type) is strongly recommended to protect the pin contacts when the receptacle is unmated during shipping, storage, or pre-installation. A mounting gasket between the flange and the enclosure face is recommended to maintain enclosure environmental integrity at the mounting holes.
