DETAIL SPECIFICATION SHEET
CONNECTORS, ELECTRICAL, CIRCULAR, RECEPTACLE, THREADED,
WALL MOUNTING FLANGE, REMOVABLE CRIMP CONTACTS, SERIES III, METRIC
This specification is approved for use by all Departments and
Agencies of the Department of Defense.
The requirements for acquiring the product described herein
shall consist of this specification sheet and MIL-DTL-38999.
FIGURE 1. Receptacle, classes F, G, J, K, M, R, S, T, W, X and Z.
AMSC N/A FSC 5935
METRIC
MIL-DTL-38999/20G
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3
9 April 2015
SUPERSEDING
MIL
-DTL-38999/20G
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2
3
1 October 2011
MIL-DTL-38999/20G
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Shell
size Shell size
code M
max
front or rear
panel
thickness
(see note 5)
P
± 0.20 PP
± 0.20 R1
(see note 3) R2
(see note 4) S
± 0.3
9 A
5.80
(.228)
3.25
(.128) 5.49
(.216) 18.26
(.719) 15.09
(.594) 23.8
(.937)
11 B 3.25
(.128) 4.93
(.194) 20.62
(.812) 18.26
(.719) 26.2
(1.031)
13 C 3.25
(.128) 4.93
(.194) 23.01
(.906) 20.62
(.812) 28.6
(1.126)
15 D 3.25
(.128) 4.39
(.173) 24.61
(.969) 23.01
(.906) 31.0
(1.220)
17 E 3.25
(.128) 4.93
(.194) 26.97
(1.062) 24.61
(.969)
33.3
(1.311)
19 F 3.25
(.128) 4.93
(.194) 29.36
(1.156) 26.97
(1.062) 36.5
(1.437)
21 G
5.00
(.197)
3.25
(.128) 4.93
(.194) 31.75
(1.250) 29.36
(1.156) 39.7
(1.563)
23 H 3.91
(.154) 6.15
(.242) 34.93
(1.375) 31.75
(1.250) 42.9
(1.689)
25 J 3.91
(.154) 6.15
(.242) 38.10
(1.500) 34.93
(1.375) 46.0
(1.811)
FIGURE 1. Receptacle, classes F, G, J, K, M, R, S, T, W, X and Z – Continued.
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MIL-DTL-38999/20G
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Shell
size Shell size
code V
+ 0.00
- 1.25
V’
+ 1.4
- 0.0
W W’ Z
max Z’
max
(classes
J and M
only)
9 A 20.83 19.5 2.5/2.1 3.65/2.1 31.5
(1.240) 32.0
(1.260)
11 B 20.83 19.5 2.5/2.1 3.65/2.1 31.5
(1.240) 32.0
(1.260)
13 C 20.83 19.5 2.5/2.1 3.65/2.1 31.5
(1.240) 32.0
(1.260)
15 D 20.83 19.5 2.5/2.1 3.65/2.1 31.5
(1.240) 32.0
(1.260)
17 E 20.83 19.5 2.5/2.1 3.65/2.1 31.5
(1.240) 32.0
(1.260)
19 F 20.83 19.5 2.5/2.1 3.65/2.1 31.5
(1.240) 32.0
(1.260)
21 G 20.07 18.7 3.2/2.1 4.35/2.1 31.5
(1.240) 32.0
(1.260)
23 H 20.07 18.7 3.2/2.1 4.35/2.1 31.5
(1.240) 32.0
(1.260)
25 J 20.07 18.7 3.2/2.1 4.35/2.1 31.5
(1.240) 32.0
(1.260)
NOTES:
1. Dimensions are in millimeters.
2. Inch equivalents are given for information only.
3. Front or rear panel mounting.
4. Front panel mounting only.
5. To ensure full mating of the plug or the backs hel l , i t is rec om m ended that the f ront or rear
mounting panel thi ck ness not exceed the M values specified in the table.
FIGURE 1. Receptacle, classes F, G, J, K, M, R, S, T, W, X and Z – Continued.
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MIL-DTL-38999/20G
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REQUIREMENTS:
Dimensions and conf i guration: See figur e 1. Interface dimensi ons shall be in accordance with
MIL-DTL-38999.
This connector mates with MIL-DTL-38999/26.
For insert arrangem ents: See MIL-STD-1560.
Connector acce ss ories: See SAE-AS85049.
Part or Identifying Number (PIN) example:
D38999/ 20 W A 35 P N
DoD number prefix
Specification sheet number
Class
Shell size code
Insert arrangement
Contact style
Polarizing positions
N is required for norm al position
Restrictions: Class F is not for Navy use and is inactive for Air Forc e new design use.
NOTE: The term PIN is e quivalent to the term (part number, i dentification numb er, and type
designator) which was previously used in this specification.
Qualification required: The activity responsible for the quali fied product list f or t hi s specification sheet is
DLA Land and Maritime-VQ, 3990 East Broad Street, Columbus, Ohio, 43218-3990.
Amendment notati ons. The margins of this s pecification are m arked with vertical li nes t o i ndicate
modifications generated by this amen dment. This was don e as a convenience only and the Government
assumes no liabilit y whatsoever for any inaccuracies in these notations. Bidders and contracto rs are
cautioned to eval uat e the requirements of this document based on the entire content irrespective of the
marginal notation.
Referenced documents. In addition to MIL-DTL-38999, this document references the f oll owing:
MIL-STD-1560
MIL-DTL-38999/26
SAE-AS85049
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MIL-DTL-38999/20G
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CONCLUDING MATERIAL
Custodians: P reparing activity:
Army – CR DLA - CC
Navy - AS
Air Force – 85 (Project 5935-2015-115)
DLA - CC
Review activities:
Army - AR, MI
Navy - EC, MC, OS
Air Force - 19, 99
NOTE: The activities listed above were interested in this do cument as of the dat e of this document.
Since organizations and responsibilit i es can change, y ou should verify the currency of the information
above using the ASSIST Online database at https://assist.dla.mil.
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