MIL-DTL-55302/74D
Requirements:
Dimensions and configuration: See figure 1 and table I.
Material: In accordance with MIL-DTL-55302.
Plating: The contact plating shall be gold in accordance with ASTM B488, type II, code C, class 1.27 over 100
microinches of copper in accordance with SAE-AMS-2418.
Contact identification: Contact locations are identified numerically as shown on figure 2.
Mating and unmating: The maximum mating force, in pounds, shall be 0.5 times the number of contacts, and the
withdrawal force, in pounds, shall be a minimum of 0.08 times the number of contacts and shall not exceed the
measured insertion force.
Contact resistance: With a test current of 3 A dc, the average resistance of all contact pairs measured shall not
exceed 0.010 ohm, and no individual contact pair shall have a resistance exceeding 0.020 ohm.
Dielectric withstanding voltage:
Sea level: 1,300 volts rms, 60 Hz, ac.
High altitude: 325 volts rms, 60 Hz, ac.
Current rating: 3.0 amperes.
Insert arrangement: See figure 2.
High potential test voltage: 1,300 V rms, at sea level.
Mating connectors: See MIL-DTL-55302/75.
Part or Identifying Number (PIN): M55302/74-(dash number from table I).
TABLE I. Dash numbers and dimensions.
Number of
Dimensions 1/
Dash
contacts
number
+.008 (0.20)
J +.035 (0.89)
B
A +.005
C min
D -.000
E
-.020 (0.51)
(0.013)
2.700
2.400
2.040
2.093
1.200
.097
01
39
(68.58)
(60.96)
(51.82)
(53.16)
(30.48)
(2.46)
3.700
3.400
3.040
3.093
1.700
.097
02
59
(93.98)
(86.36)
(77.22)
(78.56)
(43.18)
(2.45)
2.700
2.400
2.040
2.093
1.200
.159
03
39
(68.58)
(60.96)
(51.82)
(53.16)
(30.48)
(4.04)
3.700
3.400
3.040
3.093
1.700
.159
04
59
(93.98)
(86.36)
(77.22)
(78.56)
(43.18)
(4.04)
1/ Metric equivalents are given for information only. Millimeters are in parentheses.
4
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