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MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series ConnectorTotal > CONNECTORS > Circular > MIL-DTL-38999 series > MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connector
Product solid picturetop ↑
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Product solid picture
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
Brief introductiontop ↑
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
  —High density miniature circular electrical connector. including one form one contact to 128 contacts.
  —Contact codes including #22D、#20、#16、#12、#16.coaxial and #8 tri-coaxial
  —Bayonet coupling, locking and releasing quickly
  —Scoop - proof
  —Main key/keyway polarization
  —EMI/RFI shielding and shell to shell conductivity
  —Shock-proof and vibration-proof
  —Fluid immersion
  — Apply widely in aviation, space and military systems
　—Meet the US military standard: MIL-DTL-38999K.
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
specificationtop ↑
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
Mechanical characteristic
— Shell:Aluminium alloy
Finishing: Olive-drab cadmium plate(B);Electroless nickel coating(F);
— Insert interface:Plasteic;
— Gascket:Silicon rubber elastomer;
— Contact: Copper alloy;
Finishing: Nick plate followed gold plate;
— Life time:500 cycles.
— Shock:2940m/s2  3ms
— Vibration: Sine 294m/s2  10～2000Hz
Random 96(m/s2 )2/ Hz  408 m/s2,100～1000Hz
Random  480( m/s2 )2/ Hz,  100～300 Hz
— Contact retention force (min)
 #22D:44N   #16:111N    #8 coaxial:111N
 #20:67N   #12:111N     #8 tri-coaxial:111N
Electrical characteristics
— Dielectric withxtanding voltage (Vrms)(Mated)
Ratings
Sea level
21000m
M
N
Ⅰ
Ⅱ
1300
1000
1800
2300
800
600
1000
1000
 
  — Contact resistance:
#22D：14.6mΩ  #20：7.3mΩ
#16：3.8mΩ    #12：1.8mΩ
— Contact resistance:>=5000MΩ(500V DC)
—Contact current ratings:
#22D:5A   #20:7.5A   #16:13A    #12:23A
—Shell-to-shell conductivity:
Olive-drab cadmium plate:2.5 mV,nickel coating: 1 mV
— Shielding:
100MHz为90dB ,1GHz为85dB
10 GHz为65dB
— Coaxial contact:
Operating frequency:0～1GHz  Character resistance:50Ω
Voltage standing wave rate<=1.3
— #8 tri-coaxial contacts: Frequency With 0 ~ 20 MHz
   Voltage Ratings:500V AC max
   125V AC at 21000m
   Voltage dropped: 
  Inner and middle contact:<=75mV at 12 A
   External contact:<=75mV at 12A
Environmental characteristics
—Temperature range:
Cadmium(B):-65℃～+175℃
Nickel(F):-65℃～+200℃
—Salt spray:500h(B) 48h(F)
—Temperature shock: For 24 hours,10 cycles
— Fluid immersion: Hydraulic oil, Lubricating oil, Freezing liquid and other solvents
Finishing marking
Finishing
Salt spray
A
Black anticathode
48h
B
Black nickel plate
48h
N
Nickel plate
48h
W
Nickel plate followed by olive- drab cadmium plate
500h
S
Stainless steel passivation
1000h
 
Note: Accessories for space class products must choose electroless nickel coating
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
how to ordertop ↑
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series

      MS    27466  T   13    F     8    P    A
      (1)       (2)   (3)  (4)  (5)  (6)  (7)  (8)
(1)：MS—Series Prefix
(2)：type: 27466-wall mounting receptacle (front pannel mounting)
                 27656-wall mounting receptacle (back pannel mounting)
                 27496-box mounting receptacle (front panel mounting)
                 27505-box mounting receptacle (back panel mounting)
                 27468-jam nut receptacle
                 27467-straight plug
                 27469- wall mounting receptacle,hermetic
                 27470- jam nut receptacle,hermetic
(3)：Service class:T-shell with thread and accessory stop mechanism.(to be mounted with rear accesories)(only MS27466, MS,MS27656,MS27468,MS27467)
                              E- without thread(only MS27496,MS27505)
(4)：Shell size :09-11-13-15-17-19-21-23-25
(5)：shell plating: B-olive green cadmium plate
                             F-Electroless nickel coating
(6)：insert arrangement : Please see the figure of insert arrangement
(7)：Contact type :P-Normal crimp type pin
                              S-Normal crimp type socket
                              A-No or client appoint pin
                              B-no or client appoint socket
                              PH-solder type pin
                              SH-solder type
                              PC-short straight PCB termination pin
                              PC-long straight PCB termination pin
                              SC- short straight PCB termination socket
                              SC- long straight PCB termination socket
 (8)：Key: N- normal key；A,B,C,D
 
Note:When using PC,SC contacts,normal polarization must be mark.

MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
Product Outline Dimensionstop ↑
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
   MS27467 Plug
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Product Outline Dimensions
Shell code
D1 max
ThreadD2 
09
21.80
0.437-28 UNEF-2A
11
25.00
0.562-24 UNEF-2A
13
29.00
0.687-24 UNEF-2A
15
32.50
0.812-20 UNEF-2A
17
35.70
0.937-20 UNEF-2A
19
38.50
1.062-18 UNEF-2A
21
41.70
1.187-18 UNEF-2A
23
44.85
1.312-18 UNEF-2A
25
48.00
1.437-18 UNEF-2A
   MS27468  Receptacle
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Product Outline Dimensions
Shell code
D1
Thread D2
D3
L
A
B
d
P
09
14.53
0.437-28 UNEF-2A
30.54
3.00
22.35
27.35
17.70
16.99
11
17.78
0.562-24 UNEF-2A
35.23
3.00
25.55
32.10
20.88
19.53
13
21.59
0.687-24 UNEF-2A
38.40
3.00
30.30
35.31
25.58
24.26
15
24.77
0.812-20 UNEF-2A
41.64
3.00
33.45
38.49
28.80
27.53
17
27.94
0.937-20 UNEF-2A
44.75
3.00
36.65
41.63
31.98
30.68
19
30.66
1.062-18 UNEF-2A
49.53
3.79
39.80
46.37
35.15
33.86
21
33.83
1.187-18 UNEF-2A
52.67
3.79
43.00
49.58
38.28
37.06
23
37.00
1.312-18 UNEF-2A
55.94
3.79
46.15
52.76
41.50
40.01
25
40.18
1.437-18 UNEF-2A
59.02
3.79
50.95
55.93
44.68
43.41
   MS27466 Receptacle
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Product Outline Dimensions
   MS27656 Receptacle
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Product Outline Dimensions
Shell code
D1
Thread D2
L1
L2
L3
B
E
d1
d2
J
 
09
14.53
0.437-28 UNEF-2A
16.05
20.83
2.48
24.25
18.26
15.70
16.66
3.25
 
11
17.78
0.562-24 UNEF-2A
16.05
20.83
2.48
26.60
20.62
18.70
20.22
3.25
13
21.59
0.687-24 UNEF-2A
16.05
20.83
2.48
29.00
23.01
21.80
23.42
3.25
 
15
24.77
0.812-20 UNEF-2A
16.05
20.83
2.48
31.35
24.61
25.00
26.59
3.25
 
17
27.94
0.937-20 UNEF-2A
16.05
20.83
2.48
33.75
26.97
28.30
30.96
3.25
 
19
30.66
1.062-18 UNEF-2A
16.05
20.83
2.48
36.90
29.36
31.00
32.94
3.25
 
21
33.83
1.187-18 UNEF-2A
15.29
20.08
3.24
40.10
31.75
34.20
36.12
3.25
 
23
37.00
1.312-18 UNEF-2A
15.29
20.08
3.24
43.25
34.93
37.30
39.29
3.73
 
25
40.18
1.437-18 UNEF-2A
15.29
20.08
3.24
46.50
38.10
40.50
42.47
3.73
 
Dimension of straight PCB terminal receptacle
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Product Outline Dimensions
Note:To see P39 MIL-DTL-38999 seriesⅠPrinted circuit diagram.
Mated and unmated dimension(MS27466/MS27467/MS27656/MS27468)
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Product Outline Dimensions
 
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
Contact Arrangementstop ↑
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Contact Arrangements
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Contact Arrangements
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
Main key/Keywaytop ↑
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
 Polarization is provided be main key/keyway, with other secondary keys/keyways locating.
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Main key/Keyway
shell code
Angel/degree
N
A
B
C
D
09
95
77
-
-
113
11
95
81
67
123
109
13
95
75
63
127
115
15
95
74
61
129
116
17
95
77
65
125
113
19
95
77
65
125
113
21
95
77
65
125
113
23
95
80
69
121
110
25
95
80
69
121
110
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
Terminal Accessoriestop ↑
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series

Meet the US military standard:MIL-DTL-85049.
Order separately for accessories. Besides; we can supply the other special accessories according to the customer’s requirement.
M85049/15-S-11W
M85049/69-11AD
M85049/18-9W02A
M85049/21-9A02A
M85049/38-11W
M85049/39-11A
M85049/15-S-11W
How to order
      M85049/  15    -S   11   W   
           (1)      (2)   (3)   (4)  (5)
(1)：M85049—Series Prefix
(2)：Rear shell type: 15—45°angle quick connect
(3)：Rear shell jam nut  S-self-locking jam nut
                                       G-self-locking and grounding
(4)：shell size  09,11,13,15,17,19,21,23,25
(5)：Finishing: W-Olive-drab cadmium plate
                        N-Nickel
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Terminal Accessories
Shell NO.
Bmax
Cmax
Dmax
cable entry max
09
36.3
21.79
22.4
6.71
11
36.3
24.99
22.4
9.96
13
36.3
29.39
23.9
12.85
15 
49.0
32.49
31.8
16.03
17
49.0
35.71
33.3
19.20
19
51.6
38.51
35.1
21.46
21
53.1
41.71
38.1
24.64
23
53.1
44.91
42.9
27.81
25
56.9
47.98
44.5
30.99
M85049/69-11AD
 M85049/  69   -11   A   D 
     (1)      (2)   (3)   (4)  (5)
(1)：M85049—Series Prefix
(2)：Rear shell type: 69—shrinking pipe adapter
(3)：shell size  09,11,13,15,17,19,21,23,25
(4)：Finishing: W-Olive-drab cadmium plate
                        N-Nickel
                        A-Anode,black color
(5)：Vent type  Mull-with vent
                         D-with vent
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Terminal Accessories 
Shell Code
ФA
max
ФB
max
ФC
max
09
19.05
6.35
13.54
11
21.59
9.35
15.37
13
25.40
12.70
19.66
15
29.21
15.88
21.29
17
31.75
19.05
24.46
19
35.56
20.62
26.47
21
39.37
23.80
30.91
23
41.91
26.97
34.42
25
46.99
30.18
36.65
M85049/18-9W02A
 M85049/  18   -9   W   02  A 
       (1)    (2)   (3)  (4)  (5)  (6)
(1)：M85049—Series Prefix
(2)：Rear shell type: 18—rear shield connect cable airproof clipper
(3)：shell size  09,11,13,15,17,19,21,23,25
(4)：Finishing: W-Olive-drab cadmium plate
                        N-Nickel
(5)：cable clipper code 01,02,03,04,05,06,07,08,09 
(6)：blank (without special mark),A,B,C
Shell code
Cable clipper code
A
max
Min
max
09
01
02
19.1
11
01
03
21.6
13
02
04
25.4
15
02
05
29.2
17
02
06
31.8
19
03
07
35.6
21
03
08
39.4
23
03
09
41.9
25
04
10
47.0
 MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Terminal Accessories
 
Shell
length code
L
9～25
Normal( Blank）
38.1
9～25
A
63.5
15～25
B
88.9
21～25
C
114.3
Cable clipper code
Mated cable diameter
Y
max
X
max
min
max
01
1.57
3.18
20.3
31.75
02
3.18
6.35
25.4
03
6.35
9.53
27.9
04
9.53
12.70
30.5
05
12.70
15.88
31.8
34.29
06
15.88
19.05
35.6
34.93
07
19.05
22.23
38.1
38.10
08
22.23
25.40
41.9
41.28
09
25.40
28.58
44.5
10
28.58
31.75
48.3
M85049/21-9A02A
M85049/  21   -9   A   02  A 
   (1)       (2)    ③   ④  ⑤  ⑥
(1)：M85049—Series Prefix
(2)：Rear shell type: 21—straight cable clipper
(3)：shell size  09,11,13,15,17,19,21,23,25
(4)：Finishing: W-Olive-drab cadmium plate
                        N-Nickel
                        A-Anode,blank color
(5)：cable clipper code 01,02,03,04,05,06,07,08,09
(6)：blank (without special mark),A,B,C
Shell code
Cable clipper code
A
max
min
max
09
01
02
19.1
11
01
03
21.6
13
02
04
25.4
15
02
05
27.9
17
02
06
31.8
19
03
07
35.6
21
03
08
38.1
23
03
09
41.9
25
04
10
44.5
 MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Terminal Accessories
Cable clipper code
Mated cable diameter
Y
max
min
max
01
1.57
3.18
20.3
02
3.18
6.35
25.4
03
6.35
9.53
27.9
04
7.92
12.70
30.5
05
11.10
15.88
31.8
06
14.27
19.05
35.6
07
17.45
22.23
38.1
08
20.62
25.40
41.9
09
23.80
28.58
44.5
10
26.97
31.75
48.3
 
Shell code
length code
L
9～25
Normal（Blank）
38.1
9～25
A
63.5
15～25
B
88.9
21～25
C
114.3
M85049/38-11W
 M85049/  38    -   11   W  
       (1)    (2)   (3)  (4)  (5) 
(1)：M85049—Series Prefix
(2)：Rear shell type: 38—straight cable clipper
(3)：Rear shell jam nut  blank-Non-locking jam nut
                                      S-self-locking jam nut
(4)：shell size  09,11,13,15,17,19,21,23,25
(5)：Finishing: W-Olive-drab cadmium plate
                        N-Nickel
                        A-Anode,black color
                       S-corrosion resistant steel,passivated
 MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Terminal Accessories
 
Shell code
Amax
Cmax
Dmax
Fmax
Mated cable diameter E
min
max
09
23.1
27.9
21.6
21.79
2.49
5.94
11
23.1
27.9
22.9
24.99
3.89
5.94
13
25.7
30.5
27.9
29.39
4.83
8.33
15
26.9
31.8
29.2
32.49
6.60
11.61
17
29.5
34.3
33.0
35.71
7.19
15.60
19
35.8
40.6
38.1
38.51
8.26
16.10
21
38.4
43.2
40.6
41.71
8.71
17.73
23
42.2
47.0
43.2
44.91
9.68
20.90
25
44.7
49.5
45.7
47.98
10.62
21.67
 M85049/39-11A
 M85049/  39    -   11   A 
     (1)      (2)   (3)  (4)  (5) 
(1)：M85049—Series Prefix
(2)：Rear shell type: 39—Right angular cable clipper
(3)：Rear shell jam nut  -blank-Non-locking jam nut
                                     S-self-locking jam nut
(4)：shell size  09,11,13,15,17,19,21,23,25
(5)：Finishing: W-Olive-drab cadmium plate
                        N-Nickel
                        A-Anode,black color
                        S-corrosion resistant steel,passivated
 MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Terminal Accessories
Shell code
A max
B max
Mated cable diameter C
D max
E max
F max
G max
H
min
max
09
25.70
30.50
2.49
5.94
21.79
35.10
25.40
21.60
12.70
11
25.70
30.50
3.89
5.94
24.99
36.90
27.90
22.90
12.70
13
30.70
35.60
4.83
8.33
29.39
40.60
27.90
27.90
15.88
15
32.00
36.80
6.60
11.61
32.49
45.70
31.80
29.20
19.05
17
35.80
40.60
7.19
15.60
35.71
49.00
33.00
33.00
19.05
19
38.40
43.20
8.26
16.10
38.51
52.10
34.30
38.10
19.05
21
42.20
47.00
8.71
17.73
41.71
59.70
40.60
40.60
22.23
23
44.70
49.50
9.68
20.90
44.91
65.50
44.50
43.20
25.40
25
48.50
53.30
10.62
21.67
47.98
69.30
47.00
45.70
28.58

MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
Structure Drawing Of SeriesⅠtop ↑
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
　MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Structure Drawing Of SeriesⅠ
1.Grommet :Protect wire, avoid liquid and dust enter
2.Interfacial seal：Every contact is sealed in the insert interface. 　
3..Scoop-proof：Protect pins when blindly mated.
4.Mated seal：Receptacle is sealed with plug.
5.Five shell polarizations：Provide accurate location.
6.Socket insert interface：Interface is sealed to protect contacts. 　
7.Supporting ring：Provide reliably to install, remove and fix contacts. 　
8.Bayonet coupling.
9. Ground reed：Provide the shell conductivity before mated.
Note: Series III is same as the above, but no interchangeability between two series.
Series I —Scoop-proof, bayonet coupling; Series III —Scoop-proof, triple start, self-locking, threaded coupling. 　
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
Metal Shieldtop ↑
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
      MS27501/  B   -09   C   L
          (1)       (2)   (3)  (4)  (5)
(1)：Series Prefix  MS27501— For plug
                             MS27502— For receptacle
(2)：Finishing: W-Olive-drab cadmium plate
                        F-Nickel
(3)：shell code  08,10,12,14,16,18,20,22,24
(4)：type  C-Metal chain with eyelet
                 N-Metal chain with ring(only MS27502,for on MS27468)
                 A-without chain
(5)：length  L-127.00 SeeL1,L2,in the table
Receptacle protecting cover
Plug protecting cover
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Metal Shield
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series Connectors Metal Shield
Shell size
A max
B max
C max
D max
 d1 min
d2min
L1
L2
09
21.2
28.0
20.5
29.5
3.2
17.8
77.0
77.0
11
24.4
23.7
21.3
13
28.4
26.9
25.7
90.0
90.0
15
31.6
30.1
29.0
17
35.5
33.2
32.0
19
37.9
36.4
35.3
21
41.1
39.6
38.1
102.0
102.0
23
44.3
42.8
41.7
25
47.4
45.9
44.7
 
 
 
MIL-DTL-38999 SERIESⅠCIRCULAR ELECTRICAL CONNECTOR series
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