MIL-DTL-27599D
3.17 Shell-to-shell conductivity. When tested as specified in 4.6.15, the probes shall not puncture or
otherwise damage the connector finish and the maximum measured potential drop across assemblies
shall be as follows:
a. Series I and II with spring fingers: 2.5 millivolts.
b. Series II without spring fingers: 200 millivolts.
3.18 Humidity. When tested as specified in 4.6.16, wired, potted, mated connectors shall show no
deterioration which will adversely affect performance of the connector. Following the test, insulation
resistance shall be 100 megohms or greater.
3.19 Shell spring finger forces. When tested as specified in 4.6.17, the forces necessary to engage
and separate EMI plugs with receptacle shells shall be within the values specified in table II.
TABLE II. Shell spring finger forces.
Axial force
Shell size
Maximum (lbs)
Minimum (lbs)
8/9
25
.5
10/11
25
.5
12/13
30
.5
14/15
30
.5
16/17
35
.5
18/19
35
.5
20/21
35
.5
22/23
35
.5
24/25
35
0.5
3.20 EMI shielding. When tested as specified in 4.6.18, the EMI shielding capabilities of mated
shells with spring fingers shall not be less than that specified in table III at the specified frequencies.
TABLE III. EMI shielding effectiveness.
Leakage attenuation (dB minimum)
Frequency
MHz
Series II
Series I
100
65
90
200
60
88
300
55
88
400
55
87
800
45
85
1,000
45
85
3.21 Salt spray (corrosion). When tested as specified in 4.6.9, unmated connectors shall show no
exposure of base material due to corrosion which will adversely affect performance, when evaluated in
accordance with SAE-AIR 4789.
3.22 Electrical engagement. When tested as specified in 4.6.11, wired and mated connectors shall
provide a minimum of 0.034 inch electrical engagement.
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