MIL-DTL-83723, EN2997 & ESC10 Connectors

M83723 III ConnectorA family of miniature circular connectors based on the MIL-DTL-83723 (m83723) 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 an m83723 connector? Try our guide.

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Connector Range Characteristics

M83723

  • 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 Jam Nut
m83723, 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 mates 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.

MIL-DTL-83723 Series III Threaded Connectors product sheet downloadMIL-DTL-83723 Series III Bayonet Connectors product sheet download

Download Product Sheet: MIL-DTL-83723 Series III Thread Coupling Connectors

Download Product Sheet: MIL-DTL-83723 Series III Bayonet Coupling Connectors 

EN2997 and ESC10 connectors

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

EN2997 Connectors product sheet download ESC10 Connectors product sheet download

Download Product Sheet: EN2997 Connectors

Download Product Sheet: ESC10 Connectors

EN2997 Circular Connector

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

Example Part Number: MIL-DTL-83723 Series III THREADED coupling

MS83723 / 95  R  12-12   N

Military Prefix M83723/ 95 R 12 -12 N
Shell Type 82 Wall Mount Receptacle With Socket Contacts
83 Wall Mount Receptacle With Pin Contacts
84 Jam Nut Receptacle With Socket Contacts
85 Jam Nut Receptacle With Pin Contacts
86 Straight Plug With Socket Contacts
87 Straight Plug With Pin Contacts
91 RFI Grounding Plug With Socket Contacts
92 RFI Grounding Plug With Pin Contacts
95 Self Locking, Straight Plug With Socket Contacts
96 Self Locking, Straight Plug With Pin Contacts
97 Self Locking, RFI Grounding Plug With Socket Contacts
98 Self Locking, RFI Grounding Plug With Pin Contacts
68 Lanyard Release, Quick Disconnect Plug With Pin Contacts (not available In K & S)
69 Lanyard Release, Quick Disconnect Plug With Socket Contacts (not available In K & S)
Material & Finish A Aluminium Shell, Black Anodized Finish (not available in 91,92,97 & 98)
G Stainless Steel Shell, Passivated Finish (not available in 97 & 98)
K Stainless Steel, Passivated, Firewall Insert, (not available In 91, 92, 97 & 98)
R Aluminium Shell, Electroless Nickel Finish (not available in 97 & 98)
W Aluminium Shell, Cadmium Olive Drab Over Electroless Nickel Finish (not available in 97 & 98)
S Stainless Steel, Passivated, Full Teeth, Firewall Insert, (not available In 86, 87, 91, 92, 95 & 96)
Shell Size 8, 10, 12, 14, 16, 18, 20, 22 & 24
Insert Arrangements See Table
Keying N Normal
6, 7, 8, 9 & Y Y Is not available In Shell Size 8
1, 2, 3, 4, & 5 Insert Clocking in Normal Shell not approved for new design
Not available Shell Size 8
MIL-DTL-83723 Series III THREADED coupling

Shell and Contact Style: MIL-DTL-83723 THREADED coupling

Prefix / Contact Style Shell Style Available In Class
Pin Socket
M83723/66 M83723/67 straight plug, push-pull quick disconnect A,G,R,W
M83723/68 M83723/69 straight plug, push-pull quick disconnect with lanyard A,G,R,W
M83723/83 M83723/82 wall mount receptacle A,G,K,M,N,S,T,W,Z
M83723/85 M83723/84 jam nut receptacle A,G,K,M,N,S,T,W,Z
M83723/87 M83723/86 straight plug A,G,K,R,W
M83723/88 - hermetic box mount receptacle, solder termination J,L,N,P,Y
M83723/89 - hermetic jam nut receptacle, solder termination J,L,N,P,Y
M83723/90 - hermetic solder mount receptacle, solder termination J,L,N,P,Y
M83723/92 M83723/91 straight plug, EMMI grounding G,R,W
M83723/96 M83723/95 straight plug, self-locking coupling nut A,G,K,R,W
M83723/98 M83723/97 straight plug, self-locking coupling nut, EMI grounding N,S

Class Table - Threaded Coupling

Class Description Material Finish Temp
A Environmental, fluid resistant Aluminium Black anodize +200degC
G Environmental, fluid resistant Stainless steel Passivated +200degC
H Hermetic, solder cups Steel Fused tin +150degC
J Hermetic, eyelet contacts Steel Fused tin +150degC
K Environmental, firewall, fluid resistant Stainless steel Passivated +200degC
M Environmental, fluid resistant Aluminium Electrodeposited aluminium +175degC
N Plugs same as Class S, receptacle same as Class S or Y Stainless steel Electrodeposited nickel +200degC
P Hermetic, eyelet contacts Stainless steel Passivated +200degC
R Environmental, fluid resistant Aluminium Electroless nickel +200degC
S Environmental, fluid resistant, EMI grounding, self-locking firewall Stainless steel Passivated +200degC
T Environmental, fluid resistant Aluminium Nickel fluorocarbon polymer +175degC
W Environmental Aluminium Cadmium olive drab, 500hr salt spray +175degC
Y Hermetic Stainless steel Passivated +200degC
Z Environmental, fluid resistant Aluminium zinc nickel Zinc nickel +175degC

Bayonet Coupling

Example Part Number: MIL-DTL-83723 Series III BAYONET coupling

MS83723 / 71  R  12  -12   N

Military Prefix M83723/ 71 R 12 -12 N
Shell Type 71 Wall Mount Receptacle With Socket Contacts
72 Wall Mount Receptacle With Pin Contacts
73 Jam Nut Receptacle With Socket Contacts
74 Jam Nut Receptacle With Pin Contacts
75 Straight Plug With Socket Contacts
76 Straight Plug With Pin Contacts
77 RFI Grounding Plug With Socket Contacts
78 RFI Grounding Plug With Pin Contacts
Material & Finish A Aluminium Shell, Black Anodized Finish ( not available On Style 77 & 78)
G Stainless Steel Shell, Passivated Finish
R Aluminium Shell, Electroless Nickel Finish
W Aluminium Shell, Cadmium Olive Drab Over Electroless Nickel Finish
Shell Size 8, 10, 12, 14, 16, 18, 20, 22 & 24
Insert Arrangements See Table
Keying N Normal
6, 7, 8, 9 & Y Y Is Not Available In Shell Size 8
1, 2, 3, 4, & 5 Insert Clocking In Normal Shell, not approved for new design
Not available Shell Size 8
m83723 Series III bayonet connector

Shell and Contact Style: MIL-DTL-83723 BAYONET coupling

Prefix / Contact Style Shell Style Available In Class
Pin Socket
M83723/65 - hermetic jam nut receptacle, crimp termination H
M83723/72 M83723/71 wall mount receptacle A,G,R,W
M83723/74 M83723/73 jam nut receptacle A,G,R,W
M83723/76 M83723/75 straight plug A,G,R,W
M83723/78 M83723/77 straight plug, EMI grounding G,R,W
M83723/79 - hermetic box mount receptacle, solder termination H,Y
M83723/80 - hermetic solder mount receptacle, solder termination H,Y
M83723/81 - hermetic jam nut receptacle, solder termination H,Y
M83723/93 - hermetic solder mount receptacle, flex lead termination H,Y
M83723/94 - hermetic jam nut receptacle, flex lead termination H,Y

Class Table - Bayonet Coupling

Class Description Material Finish Temp
A Environmental, fluid resistant Aluminium Black anodize +200degC
G Environmental, fluid resistant Stainless steel Passivated +200degC
H Hermetic, solder cups Steel Fused tin +150degC
J Hermetic, eyelet contacts Steel Fused tin +150degC
M Environmental,fluid resistant Aluminium Electrodeposited aluminium +175degC
P Hermetic, eyelet contacts Stainless steel Passivated +200degC
R Environmental, fluid resistant Aluminium Electroless nickel +200degC
T Environmental, fluid resistant Aluminium Nickel flourocarbon polymer +175degC
W Environmental Aluminium Cadmium olive drab, 500hr salt spray +175degC
Y Hermetic Stainless steel Passivated +200degC
Z Environmental, fluid resistant Aluminimum Zinc nickel +175degC

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

MIL-DTL-83723 Series III contact arrangements

Shell Size Number of Contacts
Total Contact Size
20 16 12
8-2 2 2
8-3 3 3
8-98 3 3
10-2 2 2
10-5 5 5
10-6 6 6
10-20 2 2
12-3 3 3
12-12 12 12
14-4 4 4
14-7 7 7
14-12 12 9 3
14-15 15 15
16-10 10 10
16-24 24 24
18-8 8 8
18-14 14 14
18-31 31 31
20-16 16 16
20-25 25 19 6
20-28 28 24 4
20-39 39 37 2
20-41 41 41
22-12 12 12
22-19 19 19
22-32 32 26 6
22-39 39 27 12
22-55 55 55
24-19 19 19
24-43 43 23 20
24-57 57 55 2
24-61 61 61

Inserts per MIL-STD-1554

MIL-DTL-83723 Series III

Polarization Table

Shell Size Polarizing Code Key Positions Insert Position
A° B° C° D° E°
ALL N 105 140 215 265 0
10, 12, 14, 16, 18, 20, 22, 24 1 105 140 215 265 10
2 105 140 215 265 20
3 105 140 215 265 30
4 105 140 215 265 40
18 5 105 140 215 265 50
8 & 10 6 102 132 248 320 0
7 80 118 230 312 0
8 35 140 205 275 0
9 64 155 234 304 0
10 only Y (10,Z) 25 115 220 270 0
12, 14, 16, 18, 20, 22, 24 6 18 149 192 259 0
7 92 152 222 342 0
8 84 152 204 334 0
9 24 135 199 240 0
Y (10,Z) 98 152 268 338 0

ESC10

Example Part Number: ESC10KE01415PNO

ESC10KE 0 14 15 P N O

Range ESC10KE 0 14 15 P N O
Class KE Stainless Steel, Firewall (+260°C)
SE Stainless Steel, Firewall (+260°C) with Grounding Spring
YE Stainless Steel, Hermetic (+260°C)
Shell Style 0 Square Flange Receptacle
1 Hermetic, Solder Mount Receptacle
3 Hermetic, Jam Nut Receptacle
6 Plug, Non-Decoupling
Shell Size 8, 10, 12, 14, 16, 18, 20, 22, 24
Insert Arrangement See Insert Configurations by Shell Size Table(1)
Contact Style P Pin
S Socket
Shell Keying N=Normal, 6, 7, 8 and 9 alternatives
Variation O = Basic Connector
A = Lockwire holes on plug

(1) ESC10 connectors are compatible with MIL-DTL-83723 Series III contact arrangements, there are also special arrangements not shown in the table above. Please contact NYK Component Solutions for availability.

Backshells and Accessories

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