MIL-DTL-26482 Series I circular connector , Threaded coupling military connector | Bayonet military circular connector | Panel Mount & Cable Mount | Ruggedized Military Electrical Connector, Aerospace Plug&Socket, MS3111E22-21PN

Product Overview

The MS3111E22-21PN connector is the cable-side half of a MIL-DTL-26482 Series I coupling: a size 22 shell carrying pin contacts on the 21 arrangement, a grommet seal over the termination area and an olive drab cadmium finish on the aluminium body. It is the half a maintenance team renews when a cable assembly has been cut, chafed or soaked — the receptacle bolted to the bulkhead stays where it is, and only the cable end comes off. Mating is governed by shell size and insert arrangement rather than by the whole part number, so this half pairs with a size 22, arrangement 21 socket half already fitted to the equipment. The bayonet ring latches with a short twist, and the keyed shell blocks a wrong-half connection before any contact can touch. If the connector in service carries a different shell type or contact gender, read the number off the old body and send it over — a mil-dtl-26482 connector manufacturer can confirm which cable half matches from those codes alone, without asking you to rework the panel.

• One half, not a pair. The panel mount military connector bolted to the bulkhead is never disturbed — the replacement plugs into the receptacle already wired and sealed into the equipment.
• Pins on the moving half. Handling, coiling and re-termination all happen at the cable end, so the more exposed contacts are the more robust ones and the sockets stay recessed inside the fixed half.
• Keyed before anything can touch. The shell keyways engage ahead of the contacts, so a hurried connection on a night shift cannot bend a pin or force a half home in the wrong orientation.
• Bayonet ring, short-twist latch. The halves seat and latch in a quarter turn, which is what makes a bayonet circular connector ip68 practical on a cable assembly that is opened for inspection more than once in its life.
• Serviceable from the cable end. The grommet and the rear hardware are reached from the cable side, so a re-termination does not require the panel half to come off its bulkhead.
• One numbering system across the range. Shell types, seal types and finish codes come from the same 26482 system, so neither a single repair nor a 26482 connector wholesale order introduces a second connector standard into stores.

Shell & Mechanical Durability

The shell is a cadmium-plated aluminium alloy body finished to MIL-STD-171, and that pairing does two jobs. Aluminium keeps the coupling light enough to handle on a ladder or inside an avionics bay; the cadmium layer takes the salt air, hydraulic fluid and constant handling that strip an untreated surface within a season.

Coupling life is rated at 500 mating cycles minimum. That figure is what decides whether a connector survives an inspection schedule — a wire bundle opened at every phase check, over a service life measured in years, still sits inside the rating.

Contact retention sits in the insert rather than in the backshell. Each contact is held at a fixed depth, so the mating half meets it at the same point every time and a pin cannot walk back into the shell after repeated connects.

Shielding runs through the shell and the grounded backshell rather than through a separate braid adapter, which keeps a wire bundle sharing a route with switching power supplies or radio equipment readable without extra hardware.

As a mil-dtl-26482 connector manufacturer, we machine and plate these shells in our own plant. A batch that sits in stores for two years before it is fitted comes out of the bag with the same plating and the same coupling feel as the first article.

Environmental Sealing

Sealing is what separates this family from a general-purpose circular connector. The rear grommet closes around each wire as the insert is seated, the mated interface closes on an elastomeric face, and the contact chamber stays dry when the equipment is washed down, rained on or briefly submerged. The bayonet circular connector ip68 rating covers immersion to 10 m depth — deeper than a deck washdown or a bilge event normally reaches. Temperature sits alongside that. Salt and fluids are handled by the plating rather than by the grommet alone. Cadmium over aluminium resists salt spray and the hydraulic and fuel exposures that attack untreated alloy, while the grommet compound stays resilient instead of hardening and losing its grip on the jacket. Two things decide whether the rating survives in service. The grommet has to match the cable diameter — stretched over an oversized jacket it will not close, and too loose it will not grip — so tell us the jacket size when the cable assembly is being built.

Electrical Performance

• Chemical-resistant thermoplastic insert. The insert holds every contact at a fixed spacing and does not creep under thermal load, which is what keeps resistance stable across a long service life.
  • Signal stability in a dense loom. Each contact sits in its own dielectric position, so a low-level transducer line stays readable next to a switching supply in aerospace circular connector plug and socket assemblies.
  • Contact gender fixed by the number. This build carries pins; if the drawing specifies sockets on the cable side, the S code in the same position gives the matching configuration.

Compliance & Certification

Each connector is built to MIL-DTL-26482 Series I, Revision G — the revision that governs shell dimensions, insert arrangement and coupling geometry for this family, and the one most defence drawings still call out.

Production runs under an ISO 9001:2015 certified quality system, which is what makes batch-to-batch consistency on 26482 connector wholesale orders something you can audit rather than take on trust: incoming inspection sees the same plating, the same insert position and the same coupling feel from lot to lot.

Every connector is checked for environmental sealing and high-vibration performance before it is released, because those are the two failure modes that end up as a line stoppage rather than an inspection note.

RoHS/REACH compliant versions are available where a program requires them — say so at enquiry, because the compliant build is not the default for every finish. If your receiving department needs a particular declaration or test record with the shipment, tell us when the order is placed and we will confirm what can travel with it.

We do not claim a formal qualification listing for this part. If your program requires source approval or a first-article report, raise it before the order, and as a military circular connector supplier we will say plainly what we can support.

Coupling, Keying & Installation

1. Confirm the two codes that decide fit. Shell size and insert arrangement govern mating. Check both against the half already fitted before the new cable end is built, and check contact gender at the same time.
2. Line the keyways up first. Rotate the cable half until the keys align; the shell enters one way only. On a panel mount military connector the key position is fixed, so there is nothing to adjust on the equipment side.
3. Seat, then turn the ring. Push the halves fully home and rotate the coupling ring until it latches. The ring should move freely and stop positively — a ring that needs force usually means the keyways are not seated.
4. A half-turned ring looks mated and still leaks.
5. Re-seat the rear joint after any re-termination. The grommet must close on each jacket and the rear hardware must be tightened to its stop; this is the joint that decides whether the seal survives a repair.
6. Check the coupling style on the drawing. Series I uses a bayonet interface. If the requirement is written as a threaded coupling circular connector, send the drawing over before the order is released so the correct shell body is built rather than substituted.

Target Applications

• Aerospace avionics and flight control. Runs between an equipment bay and an actuator, where an aerospace circular connector plug half has to survive pressure cycling, vibration and a maintenance schedule that opens it more than once a year.
• Ground combat vehicle electronics. Turret and hull wiring exposed to shock, dust and washdown, where the cable half is the part most often damaged and most often swapped.
• Naval shipboard equipment. Deck boxes, masthead sensors and interior sub-systems where salt air corrodes anything not plated for it and the connector is reopened at every refit.
• Undersea sensor arrays and communication buoys. Pressure housings and buoy cable terminations that are immersed by design rather than by accident.
• Rugged industrial automation. Oil and gas skids, mining equipment and heavy machinery control cabinets, where the environment is airborne rather than defence-specific but no less punishing.
• Depot and field repair. The single most common reason this half is ordered: a damaged cable assembly, a receptacle that stays on the equipment, and a replacement needed before the platform goes back into service — which is where buying from a military circular connector supplier that answers on the same day changes the repair time.

Technical Specifications

Series & Part-Number Reference

Ordering & Delivery

1. Quote against the codes, not a description. Send the number as it appears on the drawing or on the old body — shell type, shell size, arrangement, contact gender, orientation and finish code. We quote from those codes, so a missing letter changes the part.
2. Confirm the mating half. Tell us the shell size, arrangement and contact gender of the half that stays on the equipment, so the cable end arrives ready to mate rather than ready to return.
3. Set the quantity. Flexible MOQs let a single replacement sit on the same quotation as a production call-off.
4. Choose the finish and any marking. Olive drab cadmium is the standard build; black anodized, olive green cadmium, stainless passivated and electroless nickel are available, and any marking requirement has to be stated on the order.
5. Agree the delivery route. Stable global delivery covers export packing and routing — tell us if the consignment has to meet a specific dock date or build slot.
6. Flag urgent repairs separately. A field replacement and an aerospace circular connector plug build for a new program move at different speeds, so say which one you are placing.
7. Share the forecast on repeat parts. Where a program draws on 26482 connector wholesale quantities of the same number, tell us the forecast with the first order so the quantity can be planned rather than re-quoted each time.
8. - Straight from the line. Shells, inserts and contacts are made and assembled in our own plant, so the engineering answer comes from the people who built the part rather than from a catalogue desk. - 26482 connector wholesale supply. Because 26482 connector wholesale orders run off our own line, mixed shell sizes and insert arrangements can travel on one consignment instead of being split across several vendors.
   • One source for the whole cable assembly. As a military circular connector supplier we cover the mating halves, contacts and backshell variations, so a build does not stall waiting on a single line item from a second vendor.
   • Range continuity. Wall-mount, box-mount, jam-nut, straight-plug and bulkhead shells share the same insert and contact system, including the threaded coupling circular connector bodies, so spares can be held against one numbering scheme.
   • Backward-compatible by design. The interface follows the standard rather than a proprietary pattern, so a platform already built around MIL-SPEC hardware can take this half without a drawing change.
   • Fewer times the cable assembly comes apart. A sealed, plated, keyed coupling reduces unplanned re-opens over a platform's life, and those re-opens are where most of the maintenance cost actually sits.

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 mil-dtl-26482 connector manufacturer, our answers come from the people who build the parts — from first enquiry through after-sales support.

FAQ