MIL-DTL-26482 Series I circular connector | Vibration resistant | Salt spray resistant | High temperature resistant | Waterproof | Shockproof military circular connector，Aerospace Plug&Socket, MS3114E8-4S

Product Overview

The ms3114e8-4s connector is the fixed half of a MIL-DTL-26482 Series I coupling: a jam nut receptacle that passes through a panel or bulkhead and stays there while the cable half does the plugging and unplugging. It carries socket contacts in the 8-4 arrangement in a small shell, behind a keyed interface and a sealed contact chamber, so the enclosure side of a circuit is closed, polarised and protected before any cable is attached. On a build this is the part that turns a cable assembly into an installed system. The receptacle is fitted once, at the panel shop or on the line, and from then on it defines the mating point for a control box, an instrument housing, a vehicle-mounted electronics bay or a test fixture. Because the sockets sit on the fixed side, the pins travel with the cable half — a bent or worn contact in service is answered by swapping the plug, not by opening the enclosure and re-terminating the receptacle. We build and supply it as a military circular connector supplier rather than through a distribution chain, which is what makes it practical to order both halves of a coupling together and have them arrive with matching plating, contact specification and keying.

• A panel mount circular connector from the thread out: the mounting thread, seating face and jam nut are cut for through-panel fitting, so the shell sits square against the panel instead of being held straight by the coupling ring.
• Sealing designed at the mating face: the grommet service class and the sealed contact chamber close the interface itself, and the rear grommet grips each wire as it enters the shell — the two sealing points a waterproof circular connector factory has to get right together.
• A keyed interface that engages one way only: the shell keyway and contact orientation take the guesswork out of mating, which is where mis-mating usually begins.
• Contacts held where they were set: the chemical-resistant thermoplastic insert locates every contact and keeps it from drifting as the shell expands and contracts.
• Aluminium alloy shell with a cadmium finish: the marked part number leaves the finish suffix off, which means olive drab cadmium is standard. Black anodized, olive green cadmium, passivated stainless and electroless nickel finishes exist in the series if your drawing calls for one. - Aerospace circular connector geometry with industrial availability: the same shell and coupling system appears on avionics racks, ground vehicle harnesses and skid-mounted control cabinets, so one part-number family can cover several builds.

Sealing and Environmental Protection

The sealing on this receptacle works at two places: the contact chamber behind the mating face, and the rear grommet where each wire enters the shell. The interface itself is closed by the coupling, so a mated pair presents one continuous barrier rather than two protected halves with a gap between them. The sealing class and the immersion depth it is rated to are listed with the specifications. That matters more than it sounds on a panel. Enclosures get washed down, left out in rain, sprayed with deck water or briefly submerged, and the receptacle is usually the only path into the box. Aluminium shell and thermoplastic insert expand at different rates as equipment goes through thermal cycling, which is why the insert has to hold each contact in position rather than simply insulate it; a contact that shifts even slightly changes the engagement force at the mating face. Waterproof is a word that gets used loosely, so it is worth being precise: the rating a waterproof circular connector factory quotes holds only when the wires are terminated correctly through the grommet and the coupling is fully engaged. A gland left loose, or a grommet pierced with the wrong tool, undoes the rest of the design. Sealing is not a claim we outsource.

Electrical Performance and Shielding

• Plating that reads the same on every lot: gold over nickel puts a nickel barrier between the base metal and the surface, and the gold carries a low, stable contact resistance through repeated mating.
• Ratings matched to control and signal duty: the per-contact current and voltage are listed in the specifications below. Check them against the load the circuit actually draws, and allow for the fact that a shared return contact can carry more than the signal contacts around it.
• Precision-machined contacts: machined contacts hold their diameter and concentricity through the insert, so the mating pin meets the same engagement every time rather than a fit that loosens with use.
• A shielding path through the shell: the conductive shell and plated coupling carry the shielding across the mated pair. If your build has an EMC test to pass, tell us and we will confirm the shielding data available for the series.
• Contact gender is fixed at order: on the ms3114e8-4s connector the S suffix means sockets on the fixed side. If the cable-assembly drawing puts pins on the panel side, that is a different configuration in the same series and we will quote it rather than have you rework the cable assembly.

Mechanical Durability and Contact Retention

The mechanical side of this receptacle is mostly about what does not move. The coupling ring pulls the two halves together and holds them, the keyway keeps the engagement aligned, and the insert keeps every contact at a fixed depth. Under vibration those three have to work as one system, because a connector that loosens by a fraction of a turn starts fretting at the contact surfaces long before anything looks broken.

That is the difference between an ordinary circular connector and a vibration resistant circular connector: retention is designed in from the start. The shell is aluminium alloy with cadmium plating, a combination chosen so the coupling threads and the keyway survive repeated engagement without galling or corroding into place, and the mating-cycle life the mil-dtl-26482 connector manufacturer quotes for the series is published with the specifications.

What wears first in service is predictable. The coupling ring shows plating rub along the thread flanks, the keyway takes the load if a plug is forced on, and the insert face collects handling marks. None of these is a failure on its own; together they are the three supports look at when a unit comes back from the field.

Shock loading follows the same logic: the mass of the cable half is carried by the coupling and the shell, not by the contacts, so a knock on the cable bundle does not translate into a load on the pins.

Compliance and Quality

• MIL-DTL-26482 Series I, Revision G: the part is built to the series revision that military drawings call out, which is what lets it sit on a legacy wiring assembly without a deviation.
• ISO 9001:2015 manufacturing: the quality system behind the line is certified to this standard, so process control is documented rather than informal.
• RoHS/REACH compliant versions available: the qualification is not claimed for every part by default. If your programme requires it, put it on the enquiry and we will supply the compliant version.
• Plating and shielding references: shell plating follows MIL-STD-171 and shielding effectiveness is stated to MIL-STD-461. Note the revision on your drawing if you need it matched exactly.
• One source for the build: the shell, plating and contact specification are set by a single mil-dtl-26482 connector manufacturer, so a batch does not arrive as a mix of parts from different subcontractors.
• Sealing checked before packing: units are sealed and inspected in the same waterproof circular connector factory that builds the shell assembly. Price is rarely the number that decides a connector choice; the cost of the interface failing is. A receptacle that lets moisture into a control box, or works loose on a vehicle wiring loom, turns into rework at the panel, a depot visit or a line stoppage — the part itself is the smallest item on that bill. That is the argument for building to a named standard rather than to a drawing that only looks similar. MIL-SPEC interoperability is the practical half of the same point. Because the interface follows MIL-DTL-26482 Series I, this receptacle drops into wiring looms that already exist, and the same shell family can serve several programmes instead of each one carrying its own connector. Fewer part families on the shelf means simpler logistics, less training on the line, and fewer places for a wrong mating half to hide. Backward compatibility here is deliberate rather than incidental: the geometry is the one legacy drawings were written around, so a replacement does not force a redesign of the panel or the wiring loom. As a mil-dtl-26482 connector manufacturer we can say the same about supply — the part stays available in the same configuration, which is what a sustainment programme actually needs. Being a military circular connector supplier with its own production also shortens the loop when something is not standard. If your drawing calls for a different finish, a different contact gender on the panel side, or a mating plug sourced with the receptacle, that is a conversation with the people who build the part rather than a request passed up a chain.

Part Number Breakdown

Panel Mounting and Termination

1. Check the panel drawing before anything is cut. This panel mount circular connector is a jam nut receptacle, so the panel needs one round hole plus clearance for the jam nut on the rear face. Confirm the panel thickness against the thread length you have been quoted.
2. Deburr both faces of the hole and keep it square to the panel. A hole drilled off-axis pulls the shell out of line and loads the keyway every time the plug goes on.
3. Fit the receptacle through the panel and run the jam nut down hand-tight before torquing. If your build procedure does not already call out a torque figure, ask us for it rather than guessing — as a military circular connector supplier we would sooner send you the figure than have a panel joint come back loose.
4. Check the panel joint as a separate item. The receptacle's own sealing is at the contact chamber and the rear grommet; if your drawing specifies a panel gasket or O-ring, make sure it is on the parts list.
5. Terminate the wires through the rear grommet, keeping the seal intact around each wire so the waterproof circular connector holds its rating through washdown, rain and deck spray.
6. Offer the plug up with the keyways aligned and turn the coupling ring by hand until it seats. Never force it past the key.
7. Prove the installation before the panel is closed: continuity end to end, no cross-threading on the coupling, and a visual check that the insert has not moved in its shell.

Target Applications

• Aerospace avionics and flight control: the aerospace circular connector pattern this shell follows is the one used on avionics racks, instrument panels and flight control runs, where a receptacle fixes the interface to the airframe side and the cable assembly plugs in at service time.
• Ground combat vehicle electronics: hull and turret electronics need a connection that survives track vibration and stays keyed to the right circuit, and the fixed half stays with the vehicle while cables are swapped in the depot.
• Naval shipboard and deck equipment: salt spray and washdown are daily conditions, and the cadmium-plated shell with a sealed contact chamber keeps the panel joint out of the corrosion cycle.
• Undersea sensor arrays and communication buoys: pressure housings use the receptacle as the sealed penetration point, with the cable half made off on the wet side.
• Oil, gas, mining and heavy machinery: skid-mounted control cabinets and drill rigs use the same shell where a vibration resistant circular connector is cheaper to live with than a terminal that works loose.
• Test equipment, instrument housings and panel builds: a compact fixed receptacle gives a bench fixture a repeatable connection point instead of a flying lead.

Technical Specifications

Ordering and Delivery

1. Send the part number exactly as it appears on your drawing or on the part you are replacing, and tell us if you need the mating plug as well. We will confirm shell type, shell size, layout, contact gender and finish against your requirement before quoting.
2. Give us the quantity and the date the build needs it. Flexible MOQs apply; on configurations that are not held as stock the minimum is set by the production run, so confirm it with your sales contact before releasing the order.
3. Raise any documentation requirement at enquiry — certificate of conformity, dimensional report, or anything else your incoming inspection needs — so it travels with the shipment instead of following it.
4. Payment terms and Incoterms, whether FOB, CIF, CNF or another arrangement, are fixed when the quotation is issued.
5. Production time depends on the configuration and the quantity on the order; the schedule is confirmed with you at the time of ordering.
6. Tell us if your line needs a specific packing method. Standard export packing is used by default, and a change to packing affects both cost and minimum quantity.
7. Orders ship from Shenzhen with stable global delivery. Share the consignee and the freight terms and we will plan the shipment around your build date.
8. Quality problems within one year of delivery are handled under our after-sales terms.

Technical Support & Model Matching

Selecting the right connector is rarely a one-line decision. Send us your drawing, part number or a sample, and our engineering team will confirm the matching shell size, contact arrangement, coupling and mounting style, cross-reference discontinued or alternate part numbers, and advise on sealing and flange options for your environment. We also help troubleshoot fit, mating and signal problems, and give installation and commissioning guidance so your line stays up. As a direct manufacturer, our answers come from the people who build the parts — from first enquiry through after-sales support.

FAQ