In high-stakes applications where reliability is non-negotiable, the product circular connector stands as a robust solution engineered to meet the stringent demands of military and aerospace operations. Designed to comply with MIL-DTL-38999 Series II specifications, this connector delivers unparalleled performance in extreme conditions, applications, and competitive advantages.
It is a high-reliability circular connector certified under MIL-DTL-38999 Series II, a standard defining rigorous requirements for electrical connectors used in aerospace, defense, and industrial systems. Its design prioritizes:
Designed for mission-critical systems requiring zero-fault tolerance:
It is engineered not merely as a component but as a system-critical enabler for applications where failure is not an option. Its adherence to MIL-DTL-38999 Series II underscores a commitment to excellence, making it the optimal choice for engineers prioritizing longevity, safety, and performance. For tailored integration support or custom configurations, contact our technical team to discuss your project requirements.
| Property | Value |
|---|---|
| Standard | MIL-DTL-38999 Series II |
| Product type | aerospace plug&socket pairing |
| Coupling | Threaded or bayonet |
| Mounting | panel mount & cable mount |
| Sealing | IP67 |
| Operating temperature | -65 °C to +200 °C |
| Vibration | 10–2000 Hz |
| Shock | 100 G |
| Salt fog | Corrosion resistant |
| Contact plating | Gold |
| Keying | Polarized insert, color-coded |
| Flame resistance | Materials compliant with MIL-STD-810 |
Mating and unmating is a quick-disconnect action, which keeps a repair inside the shift it was planned for. Sealing is layered rather than single-point: a seal at the mating interface, rear wire seals around each conductor, and a seal in the body of the shell itself, so moisture is stopped in three places even while the cable is flexing. The insert is polarized, so the halves can only go together one way round, and color-coded inserts make the correct pairing obvious on a panel that carries several shells. Contact faces are gold plated to hold a low-resistance joint and resist corrosion over repeated mating cycles. Shells, plating and seals come from one circular connector manufacturer, so a replacement behaves like the part it replaces.
| Item | What it covers |
|---|---|
| Plugs | Cable-end halves with the coupling ring, matched to the receptacle they mate with |
| Receptacles | Panel-mount and cable-mount bodies with mounting hardware for the shell size |
| Contacts | Pins and sockets for the insert arrangement and the wire being terminated |
| Rear accessories | Hardware that closes the cable entry and supports the bundle behind the shell |
This listing covers MS27472T12F35PN, one combination inside a wider D38999 range. The numbering scheme fixes the rest: shell size, insert arrangement, contact arrangement and keying all follow from the characters in the number, so a D38999 connector can be matched by number instead of by eye. Coupling and mounting hardware are confirmed with the number as well, because threaded and bayonet shells share inserts but not coupling hardware. Other combinations are built on the same line, which keeps mating halves and rear hardware consistent when one cable assembly uses more than one shell size.
The number fixes one build within the MIL-DTL-38999 Series II circular connector range: shell size, insert arrangement, contact arrangement and keying all follow from it. That is why the characters are worth copying exactly from the connector being replaced or from the drawing, since two shells with the same insert can still differ in coupling or mounting hardware.
No. The two coupling styles lock in different ways, so a threaded shell mates only with a threaded half and a bayonet military circular connector only with a bayonet half. The half that stays on the equipment is the one to match, and the same insert and contact arrangement can then be supplied in either coupling style.
Yes. Together the two halves form an aerospace plug&socket pairing: the panel-mount body fastens through a bulkhead, a control box wall or an instrument face, while the cable-mount half takes the rear accessory that grips the bundle. Both are built to the same insert and keying, so they mate first time.
Yes. Pins and sockets are supplied for the insert arrangement and the wire being terminated, and the rear hardware that closes the cable entry is supplied for the shell size, so a cable assembly can be completed without a second sourcing round. Because the military connector manufacturer builds both, contacts and rear accessories are matched to the shell before they ship.
The insert is polarized and the shell is keyed, so the halves mate in one orientation only and contacts cannot touch in the wrong position. Where several shells share a panel, color-coded inserts make the correct pairing obvious during assembly and during fault-finding.
It is used in airborne, shipboard and vehicle-mounted equipment: avionics and flight control runs, engine monitoring leads, radar and tactical vehicle electronics, deck and below-deck systems, and the control boxes and instrument panels that sit behind them. Those are the installations where the shell is specified as a ruggedized military electrical connector, because vibration, salt mist and temperature swings are normal working conditions rather than occasional events.
