MIL-DTL-38999/29C
QUALIFICATION: Connectors shall meet the qualification requirements of MIL-DTL-38999 with the
exceptions and additions specified below. Group C periodic requalification testing, including the selection
of Group C test samples, shall be in accordance with testing specified in this specification sheet and
MIL-DTL-38999 Group C, 24 month testing.
Durability:
Wired connectors shall meet the durability requirements of MIL-DTL-38999, with the following
exception: Total number of cycles of normal mating and unmating shall be 250 (200 cycles of normal
mating and unmating followed by 50 cycles of normal mating with pull-separation unmating).
Pull-separation at temperature:
In addition to mating and unmating by normal coupling ring rotation, the connector shall be capable of
lanyard-pull separation at any angle within 15° of the normal axis after exposure for 1 hour minimum at
the following temperatures as shown in table II: Room ambient temperature, -65°C (+ 0°C / -5 °C),
and at the maximum temperature of the specified class. Each connector shall have one straight (0°)
pull and one pull at 15° from straight, with a pull rate not exceeding 13 cm/second. Each pull test shall
be performed within three (3) minutes of removal from the temperature chamber without forced heating
or cooling. Maximum separation forces shall be as specified in table III.
TABLE II. Separation test temperatures.
Pull Type
Step 1
Step 2
Step 3
max temperature of
Straight, 0° Pull
-65° + 0° / -5 °C
Room ambient
specified connector class
max temperature of
15° Pull
-65° + 0° / -5 ° C
Room ambient
specified connector class
TABLE III. Separation forces (max).
15°
Shell
Straight
size
pull (N)
pull (N)
11
200
245
13
200
245
15
200
245
17
400
445
19
400
445
21
400
445
23
400
445
25
400
445
Fail-safe disengagement:
Connectors shall be partially mated with the plug coupling ring rotated approximately 50% of full
coupling. Pull-separation both straight and 15° from straight at ambient temperature shall be
accomplished within the limits specified in table III.
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