MIL-DTL-26500
Features and Application
MS2426*/AE66*
Features and Application
MIL-DTL-26500 family offers connectors with bayonet
coupling as well as threaded coupling. These connectors are
intermateable with correspondingly coupled MIL-DTL-83723
Series III connectors (except shell size 8, threaded coupling
only).
AE66 connectors are widely used on commercial, military
and aerospace systems requiring general-purpose, miniature
cylindrical bayonet or threaded coupling connectors.
This family (bayonet as well as threaded) of connectors
is offered in wall mount receptacles, jam nut mounted
receptacles which incorporate O’ring seals, designed for
rear panel “D” hole mounting, and straight plugs.
Twenty-one insert arrangements per MIL-STD-1554 are
tooled and qualified to MIL-DTL-26500, utilizing 3 to 57
M39029 contacts. Contacts come in sizes 20, 16 and 12,
terminating wire sizes from 24 to 12 gauge.
These connectors are only available in aluminum shells
with anodic plating to the MS number. In addition, we offer
connectors with passivated stainless steel shells to commercial
callouts only.
Insert Polarization
Alternate insert positions documented in the original
specification, positions 1 through 5, are still available (except
in shell size 8), but are not approved for new design. These
alternate insert clocking positions aid in mating of adjacent
connectors having identical insert arrangement.
Shell Polarization –
Alternate key/keyway positions prevent
cross mating of adjacent connectors having same insert
arrangement.
Connector Sealing –
A pressure seal at the connector
interface is accomplished through the aid of a coupling
device which compresses the front resilient insulators and
thus offers a seal around each contact preventing the
passage of moisture through the contact cavity. Rear resilient
insulators are designed with a triple wire seal in each cavity
to offer positive sealing and prevent wicking of moisture
through the connector without the use of external clamping
devices or adapters. In addition, a dynamic O’ring seal in the
receptacles engages the front of the plug shell when
connectors are mated and offers yet another barrier to
moisture and contaminants.
Superior Contact Stability -
Front release crimp contact
system features a beryllium-copper retaining clip completely
encased in a tough dielectric wafer, thus protecting the clip
tines from damage.
Closed Entry Socket Contacts
Closed-entry socket contacts facilitate positive mating.
26500
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MIL-DTL-26500
Performance Specifications
MS2426*/AE66*
Performance Specifications
Operating Temperature Range
Class R: -55°C to +200°C (-67°F to +392°F)
Class E*: -55°C to +200°C (-67°F to +392°F)
Material and Finish Data (Class)
R – aluminum shell, black anodized finish
E*– stainless steel shell, passivated
Corrosion Resistance
Classes R and E* withstand 48-hour salt spray.
Environmental Seal
Wired, mated connectors shall meet the altitude-immersion
test specified by MIL-DTL-26500.
Fluid Resistance
Unmated connectors resist specified immersions in
MIL-PRF-5606 (hydraulic fluid), MIL-PRF-23699 (lubricating
oil), MIL-PRF-7808 (lubricating oil), MIL-DTL-5624 (JP-5)
and glycol.
Durability
Bayonet Coupling – 500 cycles
Threaded Coupling – 200 cycles
Shock and Vibration Requirements
Wired, mated connectors shall not be damaged, coupling
ring shall not loosen, and there shall be no interruption of
electrical continuity longer than one microsecond when
subjected to the following:
Shock
Mated connectors withstand a pulse of approximate
half sine wave of 100 G magnitude with duration of
6 milliseconds applied in each of the three major axes.
Vibration
Mated connectors withstand the following vibration levels:
•
Vibration per EIA-364, test procedure 28 conducted at
a low temperature ambient of -55°C (-67°F) and high
ambient of +200°C (392°F).
Shell-to-Shell Conductivity
•
Class R is non-conductive.
•
Maximum potential drop shall not exceed 200 millivolts
for class E*
.
Voltage Rating
Suggested Operating Voltage**
Service
Rating
I
(Sea Level)
AC (RMS)
600
DC
850
Test Voltage
Sea Level
V RMS
1500
Test Voltage
50,000 Ft.
V RMS
450
Test Voltage
70,000 Ft.
V RMS
275
Test Voltage
110,000 Ft.
V RMS
200
26500
* Class E only available to commercial callouts. Consult factory for
drawings. Pages 153 thru 158 apply to class R only.
** To be used by designer only as a guide.
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MIL-DTL-26500
Part Number Development
Bayonet & Threaded Coupling
Part Number Development
Mil. Prefix
Aero Prefix
MS
AE
24266
666
R
R
12
12
T
T
12
12
P
P
N
N
-340
Shell type
24264
= Wall mount receptacle =
664
(Aero p/n)
24265
= Jam nut receptacle =
665
(Aero p/n)
24266
= Straight plug =
666
(Aero p/n)
Class (Material and Finish)
R
= Aluminum shell, black anodized finish
E*
= Stainless steel shell, passivated
Shell Size (SS)
8, 10, 12, 14, 16, 18, 20, 22
or
24
Coupling Mechanism
B
= Bayonet Coupling
T
= Threaded Coupling
Insert Arrangement
See pages 164
Contact Style
P
= Pin
S
= Socket
Polarization (Keying)
N
= Normal
6, 7, 8, 9
or
Y
(Alternate keyed positions, Y is not availabe in SS 8)
1, 2, 3, 4
or
5
(Clocked insert polarizations within normally keyed shell, not approved for new design, n/a in SS 8)
Modification
(applies to Aero part numbers only)
01
= Less contacts (is not marked on the part)
341
= Connector kitted with MS27291-XX straight clamp
Consult factory for other modifications
* Class E only available to commercial callouts. Consult factory for
drawings. Pages 153 thru 158 apply to class R only.
Note 1:
Each connector is furnished with contacts unless
ordered less contacts (L/C) as follows: Two spare contacts
for each size contact utilized and at least 15% of the number
of contacts but no less than three sealing plugs are provid-
ed. No insertion/removal tools are provided. No spares are
required for shielded contacts.
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Note 2:
Proper part number marking has no “0” in front of
single digit shell size (8), and no “0” in front of single digit
layouts. Example: MS24264R8B3SN and MS24264R18B8P6.
Please note that in this series “N” for normal is included in
part number marking.
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MS24264R**B
Wall Mounting Receptacle
AE664R**B
Bayonet Coupling, Crimp Removable, Front Release
A
B
MOUNTING
HOLES
1.421(36.09)
MAX
4x
C
MASTER
KEYWAY
.728(18.49)
.708(17.98)
.072(1.83)
.052(1.32)
D
MAX
GROMMET
F
E
ACCESSORY THREAD
4 MINOR KEYWAYS
3 ORANGE COLOR STRIPES
EQUALLY SPACED
.306(7.77) MIN FULL THREAD
Page 152
Page 161
Page 164
Page 151
Page 163
Page 160
Completed Part Number
Contacts, Sealing Plugs and Tools
Insert Arrangements
Performance Specifications
Insert Availability and Contact Information
Polarization
PANEL THICKNESS:
.125(3.18)MAX
A
Shell
Size
8
10
12
14
16
18
20
22
24
±.005
inch
.812
.937
1.031
1.125
1.250
1.343
1.437
1.562
1.703
±.13
mm
20.62
23.80
26.19
28.58
31.75
34.11
36.50
39.67
43.26
inch
.594
.719
.812
.906
.969
1.062
1.156
1.250
1.375
B
(TP)
mm
15.09
18.26
20.62
23.01
24.61
26.97
29.36
31.75
34.93
+.000
-.009
inch
.125
.125
.125
.125
.125
.125
.125
.125
.154
Ø
C
+.00
-.23
mm
3.18
3.18
3.18
3.18
3.18
3.18
3.18
3.18
3.91
+.000
-.005
inch
.536
.659
.829
.898
1.025
1.131
1.256
1.381
1.506
Ø
D
+.00
-.13
mm
13.61
16.74
21.06
22.81
26.04
28.73
31.90
35.08
38.25
E
Accessory Thread
Class 2A
7/16-28UNEF
9/16-24UNEF
3/4-20UNEF
13/16-20UNEF
15/16-20UNEF
1-1/16-18UNEF
1-3/16-18UNEF
1-5/16-18UNEF
1-7/16-18UNEF
Ø
F
Maximum
inch
.328
.420
.580
.664
.769
.902
1.033
1.152
1.282
mm
8.33
10.67
14.73
16.87
19.53
22.91
26.24
29.26
32.56
26500
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MS24265R**B
Jam Nut Receptacle
AE665R**B
Bayonet Coupling, Crimp Removable, Front Release
B
C
MOUNTING
FLAT
MASTER
KEYWAY
.306(7.77)
MIN FULL THREAD
1.421(36.09)
MAX
.781(19.84)
.761(19.33)
D
MAX
GROMMET
F
MAX
A
3 ORANGE COLOR STRIPES
EQUALLY SPACED
E
ACCESSORY THREAD
G
JAM-NUT THREAD
HEX NUT WITH
3 TEFLON PLUGS
EQUALLY SPACED
"O" RING
PANEL THICKNESS:
.125(3.18) MAX
Page 152
Page 161
Page 164
Page 151
Page 163
Page 160
Completed Part Number
Contacts, Sealing Plugs and Tools
Insert Arrangements
Performance Specifications
Insert Availability and Contact Information
Polarization
Ø
Shell
Size
8
10
12
14
16
18
20
22
24
A
±.005
inch
.979
1.104
1.291
1.391
1.516
1.641
1.766
1.954
2.079
B
±.13
mm
24.87
28.04
32.79
35.33
38.51
41.68
44.86
49.63
52.81
±.003
inch
.593
.718
.905
.968
1.093
1.217
1.342
1.467
1.592
C
±.08
mm
15.06
18.24
22.99
24.59
27.76
30.91
34.09
37.26
40.44
Ø
+.000
-.005
inch
.536
.659
.829
.898
1.025
1.131
1.256
1.381
1.506
D
+.00
-.13
mm
13.61
16.74
21.06
22.81
26.04
28.73
31.90
35.08
38.25
E
Accessory Thread
Class 2A
7/16-28UNEF
9/16-24UNEF
3/4-20UNEF
13/16-20UNEF
15/16-20UNEF
1-1/16-18UNEF
1-3/16-18UNEF
1-5/16-18UNEF
1-7/16-18UNEF
Ø
F
G
Jam Nut Thread
Class 2A
5/8-20UN
3/4-20UNEF
15/16-20UNEF
1-20UNEF
1-1/8-20UN
1-1/4-20UN
1-3/8-18UNEF
1-1/2-20UN
1-5/8-18UNEF
Maximum
inch
1.068
1.192
1.380
1.505
1.630
1.740
1.860
2.040
2.160
mm
27.13
30.28
35.05
38.23
41.40
44.20
47.24
51.82
54.86
Maximum
inch
.328
.420
.580
.664
.769
.902
1.033
1.152
1.282
mm
8.33
10.67
14.73
16.87
19.53
22.91
26.24
29.26
32.56
26500
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