AMSC N/A FSC 5935
MIL-DTL-55302/66G
w/AMENDMENT 1
31 March 2011
SUPERSEDING
MIL-DTL-55302/66G
3 February 200 4
DETAIL SPECIFICATION SHEET
CONNECTORS, PRINTED CIRCUIT SUBASSEMBLY AND ACCESSORIES:
RECEPTACLE, SOCKET CONTACTS, DECADE INCREMENTS 10 THRU 70 CONTACT P OSITIONS
AND INTERMED IATE POSITIO N S OF 14, 24, 44, 54 AND 26, 36, 56, 66 FOR
PRINTED WIRING BOARDS (.100 SPACING)
This specif ication is approved for use by all Departments and Agencies of the Department of Defense.
The requireme nts for acquirin g the product descr ibed herein shall consist of this s pecification sheet and
MIL-DTL-55302.
FIGURE 1. Connectors, receptacle, .100 (2.54 mm) spacing.
INCH-POUND
MIL-DTL-55302/66G
w/AMENDMENT 1
2
Inches
mm
Inches
mm
Inches
mm
Inches
mm
.001
0.03
.030
0.76
.130
3.30
.250
6.35
.006
0.15
.075
1.91
.150
3.81
.500
12.70
.008
0.20
.078
1.98
.161
4.09
.585
14.86
.010 0.25 .086 2.18 .187 4.76 .700 17.78
.025
0.64
.100
2.54
.200
5.08
FIGURE 1. Connectors, receptacle, .100 (2.54 mm) spacing - Continued.
MIL-DTL-55302/66G
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Number
of
contacts
A
±.010
10
.850
(21.59)
14
1.050
(26.67)
20 1.350
(34.29)
1.150
.900
24 1.550
(39.37)
1.350
1.100
26 1.650
(41.91) 1.450
(36.83) 1.200
(30.48)
30
1.850
(46.99)
(41.91)
(35.56)
36
2.150
(54.61)
40
2.350
(56.69)
44
2.550
(64.77)
50
2.850
(72.39)
54
3.050
(85.09)
56
3.150
(80.01)
60 3.350
(85.09)
3.150
2.900
66 3.650
(92.71) 3.450
(87.63) 3.200
(81.28)
70 3.850
(97.79) 3.650
(92.71) 3.400
(86.36)
NOTES:
1. Dimensio ns are in inches.
2. Metric equi v alents are given for information only.
3. Unless otherwise specified, tolerances are ±.005 (0.13 mm) .
4. These connectors mate with connectors specified in MIL-DTL-55302/57, MIL-DTL-55302/61,
MIL-DTL-55302/63 using appropriate hardware.
5. Numbers indicating the first and last positi on in each row and ev ery fourth contact position in between shall be
marked on the s i de( s) of the connector. As and option to the above, number s indicating ev ery fourth cavity
may be stamped on the side of the connector, with the exc eption that the numb er one contact shall be marked.
6. Terminat i on layout on .025 (0.64 mm) modular grid.
7. Metric equi v alents are in parentheses.
8. Contacts M55302/65-01 (standar d force) and M55302/65-02 (low force) are individual contacts shipped loose
in a plastic ba g unless otherwise specified (see MIL-DTL-55302/65). Contacts may be ordered separately.
9. Hole depth to female guide har dware is .282 min (7. 16 mm). Full thread depth to female threaded hardware is
.240 min (6.1 mm).
FIGURE 1. Connectors, receptacle, .100 (2.54 mm) spacing - Continued.
MIL-DTL-55302/66G
w/AMENDMENT 1
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Requirements:
Dimensions and configurati on: See figure 1.
Material: Jackscrews and jack sockets shall be made of corrosion resisting stainless steel in accor dance with
ASTM A581/A581M or ASTM A582/A582M pass i vated in accor dance with SAE-AMS2700 or shall be corros ion
resistant copper nickel alloy (61 ±2% nickel, 2.5% max. other, and the balance zinc and s hall have a brinell
hardness of 14 5 to 175.
Plating: The contact plating shall be in accordance with MIL-DTL-55302 or gold in accordance with ASTM B488
type II, code C , class 1.27, over ni c kel plating in acc ordance with S A E-AMS-QQ-N-290, class 2, 50 to 150
microinches in the engaging a rea and gold in acc or dance with ASTM B 488 type II, code C, class 0.51, or type III,
code A, 0.51 over nickel plating in accordance with SAE-AMS-QQ-N-290, class 2, 50 to 150 microinche s in the
termination ar ea.
Contact identi fication: See figure 1.
Contact enga gement and separat i on forces (number 22 c ontacts):
Minimum sepa r ation: 0.5 ounce.
Maximum engagement: 12.0 ounces for standard force and 4.0 ounces for l ow force.
Mating and unmating:
Standard ins ertion force contacts: The maximum mating force, in pounds, shall be the number of contact s
multiplied by 0.56 and the withdrawal force, in pounds, shall be a minim um of 0.08 times the number of contacts
and shall not exceed the measur ed insertion f or ce.
Low insertio n force contacts: The maximum mating force, in pounds, shall be the number of contacts multi plied by
0.25 and the withdrawal force, in pounds, shall be a minimum of 0.04 tim es the number of cont ac ts and shall not
exceed the ma ximum insertion force.
NOTE: Not applicable when mating and unmating is accomplished through the engaging of turning jacksets.
Jackscrew and jack socket torque: 2-inch pounds maximum fully mated.
Contact resist ance: The average contact resistance of all contacts measured shall n ot exceed 0.010 ohm, and no
individual contact pair sha ll have a resistance exceeding 0.020 ohm.
Dielectric withstanding vo ltage:
Sea level: 1,000 volts rms.
High altitud e: 300 volts rms.
Current rati ng: 5.0 amperes maximum in accordance with contact.
Insertion and removal tool: MIL-I-81969/12.
Crimp tool: M2 2520/2-01
MIL-DTL-55302/66G
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Example of Par t or Identifying Num ber (PIN):
M55302/66 L 10 L
Basic number of Type of contacts Number of Type of mounting
specification sheet contacts hardware
(see figure 1)
L = Low inserti on (Contacts supplied with L = .700 slotted turning jackset
force contacts connector are crimp M = .500 slott ed turning jackset
removable t ype for no. S = .200 sl otted turning jackset
- = Standard insertion 22 maximum wire size F = fixed jackset
force contacts .048 maximum insulation) H = hex turning jackset
Amendment no tations. The margins of this specification are mark ed with vertical li nes to indicate modifications
generated b y t hi s amendment. This was done as a convenience only and the Government assum es no liability
whatsoever for any inaccuracies in these notations. Bidder s and contractors ar e c autioned to evaluate the
requirement s of this document bas ed on the entire content irrespective of the marginal notations.
Referenced documents. In addition to MIL-DTL-55302, this document references the following documents:
MIL-DTL-55302/57
MIL-DTL-55302/61
MIL-DTL-55302/63
MIL-DTL-55302/65
MIL-I-81969/12
ASTM A581/A581M
ASTM A582/A582M
ASTM B488
SAE-AMS2700
SAE-AMS-QQ-N-290
MIL-DTL-55302/66G
w/AMENDMENT 1
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CONCLUDING MATE RIAL
Custodians: Preparing activity:
Army - CR DLA - CC
Navy - EC
Air Force - 85 (Project 5935-2010-152)
NASA - NA
DLA - CC
Review activities:
Army - AR, AT, AV, CR4, MI
Navy - AS, MC, OS, TD
Air Force - 19, 99
NOTE: The activ i ties listed above were interested in t hi s document as of t he date of this docum ent. Since
organizations and responsibilities can change, you should verify the currency of the information above using the
ASSIST Onl ine database at https://assist.daps.dla.mil/.