About MIL-DTL-5015 Solder Connectors

MIL-DTL-5015, formerly known as MIL-C-5015 is a standard for circular multi-pin electrical connectors used in harsh environmental conditions. The connectors themselves are also sometimes called 5015 type connectors.

The MIL-C-5015, affectionately called “Fifty-Fifteen” by most, is truly the grand-daddy of all modern military circular connectors.

These circular, threaded coupling connectors have been used in US and NATO military systems since the 1950s for general use and power applications. Connectors designated with the prefixes of MS3100, MS3101, MS3102, MS3106, MS3108 are designated to have solder terminated contacts which make them very simple to terminate with minimum of tooling requirements. Other variants of the MIL-DTL-5015 series may include front or rear release crimp contacts.

mil-c-5015-connectors Basic Characteristics of the MIL-C-5015
  • Reliable and economical metal cylindrical connector
  • Wide range of contact arrangements
  • Simple to install with good environmental protection

MIL-DTL-5015 Solder Connector Shell Styles

MIL-DTL-5015 connectors are IP67 rated for high-performance in critical applications. Aerospace-grade aluminum shells provide heavy-duty protection while a standard olive drab cadmium finish provides excellent corrosion resistance. Five available connector shell styles provide design flexibility for modern interconnect solutions.

Select your preferred shell style from the list below:



Straight Plug

The defining feature of the MS3106 plug is the coupling ring to achieve receptacle mating. The plug has an integrated waterproof wire-sealing backshell and cable clamp for strain relief. When disconnected, it should be sealed with a protective cover to ensure high reliability.

MS3106 Drawing

Build part number

MS3108 title=


90 Degree Plug

The MS3108 plug features a 90 degree backshell for easy cable management. The backshell has a waterproof wire seal and a cable clamp for strain relief. When disconnected, the plug should be sealed with a protective cover to ensure high reliability.

MS3108 Drawing

Build part number



Wall Mount Receptacle

The MS3100 receptacle provides a flange for panel mounting. It features an integrated waterproof wire-sealing backshell and cable clamp for strain relief. When disconnected, the receptacle should be sealed with a protective cover to ensure high reliability.

MS3100 Drawing

Build part number



Box Mount Receptacle

The MS3102 box mount receptacle has a flange for panel mounting. It is designed with a small rear profile for installation in confined spaces or where backshells are not required. The connector should be sealed with a protective cover to ensure high reliability when it is not in use.

MS3102 Drawing

Build part number



Cable Mount Receptacle

The MS3101 receptacle is designed for mounting on a cable or extension cord. It features an integrated waterproof wire-sealing backshell and cable clamp for strain relief. When disconnected, the receptacle should be sealed with a protective cover to ensure high reliability.

MS3101 Drawing

Build part number


MIL-DTL-5015 Accessories

5015 Gasket

Mounting Gaskets

MIL-DTL-5015 mounting gaskets seal the mounting space between a receptacle and a panel to maintain the environmental integrity of the enclosure. They may be used in either rear or front mount receptacle installations.

MIL-5015 Gasket Drawing

5015 cover

Protective Covers

MIL-5015 dust covers should always be used to environmentally seal connectors and protect them from damage. They not only protect contacts from dirt and corrosion, but they also keep the coupling threads clean and ready for use.

MIL-5015 Protective Cover Drawing

5015 Mounting Bracket

Mounting Brackets

Mounting brackets for MIL-5015 connectors feature captive stainless steel lock nuts to ensure reliable mounting for critical applications. Optional sealing screws with O-rings will seal the mounting holes on your enclosure from water ingress.

MIL-5015 Mounting Bracket Drawing

5015 Dummy Receptacle

Stowage Receptacle

Dummy receptacles are designed to prevent operator injury and connector damage by providing a safe place to stow and organize unused cables. They are for use with all MIL-5015 plugs. Solid flange stowage receptacles are available when full environmental sealing is required.

MIL-5015 Stowage Recept. Drawing

5015 Cable Bushing

MIL-5015 Cable Bushing

MIL-5015 rubber bushings are designed to provide MS3100, MS3101, MS3106, and MS3108 connectors with additional environmental sealing. They also protect the wire jackets from friction against the strain relief clamps. Bushings of adjacent sizes are able to nest inside each other.

MIL-5015 Cable Bushing Drawing


MIL-DTL-5015 Tools

5015 Solder Station

MIL-5015 Solder Station

The use of a professional soldering station is the first step to ensuring connector reliability. This solder station kit provides a complete solution for terminating mil-spec style solder contacts to stranded or solid core wire. Compatible for all MIL-5015 solder connectors.

MIL-5015 Solder Station Specifications


MIL-DTL-5015 Specifications

Shell Styles
5 Shell Styles: Plug, 90° Plug, Wall Mount Receptacle, Box Mount Receptacle, Cable Receptacle
Shell Sizes
13 Shell Sizes are available, size 8-40
Contacts Sizes
5 available (#16, #12, #8, #4, #0)
Contact Plating
Silver Alloy Plate, 100 100 µinches (2.54 µm) Minimum
Max Contact Resistance
6 Milliohm Maximum Resistance
Potential Voltage Drop
50 Millivolt Maximum Drop (Initial)
Current Rating
150 Amps (Test Current) at 68°F (20°C)
Max Operating Voltage
3,000 VAC (RMS) at Sea Level
Insulation Resistance
>5,000 Megohms at 77°F (25°C)
Service Classes
Inst., A, B, C, D, E
Alternate Rotations Available
Normal and W, X, Y, Z (if available)
Hermetic Configurations Available
Special Order
Operating Temperature
-67° to +257°F (-55° to +125°C)
IP Rating
Environmental IP67 Rating (Environmental Sealing)
Salt Spray Rating
500-Hour Salt Spray Rating (With Olive Drab Cadmium Finish)
Chemical Resistance
20 hour full immersion (unmated) in hydraulic fluid and lubricating oil without damage or material degradation
Coupling Style
Threaded (A-Threads), Single-Start, 4 Turns to Couple
Contact Arrangements Available
126 Standard Inserts Available
Coupling Cycles
250 Minimum
50g’s, 11ms Duration, Three Major Axes, 10 Microseconds Maximum Discontinuity
Random Vibration
10 to 2,000Hz (15g’s), 10 Microseconds Maximum Discontinuity
Shell Conductivity
Maximum Shell-to-Shell Conductivity Potential Drop less than 200 Millivolts Across Assembly
Insert Material
Resilient Polychlorophrene (Neoprene) Insert, Non-Removable and Mechanically Bonded to Shell

MIL-DTL-5015 QPL Information

Responsibility for MIL-DTL-5015 was passed to the SAE in 2000, as SAE-AS50151. Each of the individual MS part numbers or specification sheets now have SAE document numbers (a one for one transfer). So MIL-DTL-5015 has been cancelled without replacement, superseded by SAE-AS50151 specification. This specification just changed specification management to SAE organization, but connector specifications remain the same.

MIL-DTL-5015 / MIL-C-5015 QPL Document

MIL-DTL-5015 QPL Approved Manufacturers

The following is a list of manufacturers that we can currently supply MIL-DTL-5015 Solder connectors from.

  • Amphenol Aerospace
  • Amphenol Connex
  • Amphenol Industrial
  • Array Connector
  • DDK / Fujikura
  • ITT / Cannon

MIL-DTL-5015 Aliases

MIL-C-5015, MIL-5015, MIL-DTL-5015, MIL-DTL-5015H, SAE-AS50151.

These connectors have also been colloquially known as simply “Cannon Plugs” or “Fifty-Fifteen”.