MIL-DTL-83723, EN2997 & ESC10 Connectors

A family of miniature circular connectors based on the MIL-DTL-83723 form factor. These are for use in demanding applications such as military and commercial aviation engine sensors.

EN2997 and ESC10 family variants offer additional features for improved performance over the original MIL-DTL-83723 specification.

Need to know how to order a MIL-DTL-83723? Try our guide.

Amphenol Conesys CannonITTindustries Deutsch Glenair Sealtron TE

Connector Range Characteristics


  • Description: miniature circular connectors meeting the MIL-DTL-83723 specification;
  • Coupling:
    • Bayonet option - quick and positive 3 point mechanism with visual confirmation of complete coupling;
    • Threaded option – with visual confirmation of full coupling.
  • Temperature range: –65°C (–85°F) to 200°C (392°F)

EN2997 and ESC10

  • Description: improved miniature circular connectors based on the MIL-DTL-83723 form factor;
  • Coupling: screw coupling with additional anti vibration features
  • EMI Shielding: to 100 MHz at 1 GHz attenuation > 65 dB due to improved bottoming;
  • Mating: Interchangeable and intermateable with MIL-C-83723 Series III type (note that when EN2997 or ESC10 specified connectors and mated with MIL-C-83723 Series  the performance specification will meet the lower performance of MIL-C-83723).
ESC10 Circular Connector
MIL-DTL-83723, EN2997 & ESC10 connector interconnect products

M83723 connectors

Products Options:  

  • Coupling styles: Bayonet or Threaded Plugs and Receptacles (both coupling styles inter-mate with MIL-DTL-26500 connectors, except shell size 8 threaded);
  • Contacts: Rear mounted inserted and removable using standard qualified plastic tools thus avoiding potential damage to the front sealing face;
  • Body Materials: Aluminium and Passivated stainless steel versions;
  • Mounting: A variety of mounting configurations including wall mount,  nut, straight with RFI grounding;
  • Finishes:
    • Electroless nickel;
    • Olive drab cadmium;
    • Black anodizing.
  • Commercial equivalents;
  • Alternate key/keyway positions prevent cross mating of adjacent connectors having the same insert arrangement;
  • Positive alignment of pin contacts by the lead in chamfers of the closed entry hard socket inserts;
  • Raised moisture seal barriers around each pin contact that mate with the lead in chamfers of the hard socket insert;
  • The elastomer grommet is able to seal over a wide range of wire diameters and has a triple wire seal in each cavity;
  • The rear release crimped contact system features a stamped retaining clip captivated by moulded in shoulders of each contact cavity in the insulator. This produces a very stable contact;
  • High temperature firewall versions.

Download Product Sheet MIL DTL 83723 Series III Thread Coupling Connectors

Download Brochure MIL DTL 83723 Series III Bayonet Coupling Connectors 

EN2997 and ESC10 connectors

Enhanced version of the MIL-DTL-83723 connectors, these connectors feature improved anti rotation on the thread coupling and will accommodate both the older generation and the latest generation of wire sizes.

Download Brochure EN2997 Connectors

Download Product Sheet ESC10 Connectors

Did you know?

The MIL-DTL-83723 specification defined a high temperature, high vibration resistant connector. However, it was realised that an improved version of the interface was required in order to eliminate any risk of unlocking under vibration, to introduce scoop-proof features and to eliminate uncertain bottoming. EN2997 and ESC10 connectors were introduced in order to address and eliminate these concerns. Features such as self-locking on the plug to improve vibration resistance, shell to shell bottoming to improve shielding and an ability to enable more backshell positions can be found on these improved connectors in order to meet the demands of engine management, avionics, power and actuation on military and commercial aircraft. Other typical harsh environment high temperature applications include sensors for engine management and railways braking systems.

How to Order a MIL-DTL-83723 series III connector.

  1. How and where will this connector be used? Select your Shell Style , note that the MIL-DTL-83723 series III connectors are available in both threaded coupling and bayonet coupling variants. Make sure you use the appropriate tables below;
  2. What environment will this connector be used in? Select your Service Class;
  3. What is your electrical requirement? Define your Shell Size, this will be dictated by your circuit demands so therefore your Contact Arrangement;
  4. Do you need to prevent mis-mating with similar neighbour connectors? Define if your connector needs a Polarising Position.

The tables below will assist you to construct an official MIL spec part number for a MIL-DTL-83723 series III connector. Many of the connector OEM’s have their own proprietary part numbers which we can cross reference to from the Military part numbers. NYK Component Solutions are distributors for the industry leading connector OEM’s and we can provide unbiased advice for you to meet your technical and logistical requirements.

Don’t Forget ! …. please contact the product specialists and account managers at NYK should you require any advice. We are here to help.

Threaded Coupling

MIL-DTL-83723 series III threaded coupling
MIL-DTL-83723 threaded coupling
Class - Threaded Coupling

Bayonet Coupling

MIL-DTL-83723 Series III Bayonet coupling
MIL-DTL-83723 Bayonet coupling
Bayonet Coupling

Insert configurations by Shell Size and Polarization options for THREADED and BAYONET variants

MIL-DTL-83723 Series III Insert Configuration By Shell Size
MIL-DTL-83723 Series III Polarization