10-503140-032 Datasheet, PDF (241/437 Pages) Amphenol Corporation – The Interconnection Leader

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Circular Connectors – PCB Contacts
Alternate Positioning for MIL-DTL-38999
To avoid cross-plugging problems in applications requiring the use of more than one connector of the same series, size and
arrange­ment, alternate rotations are available as indicated in the accompanying charts.
In MIL-DTL-38999 Series I, II and III connectors the rotation is based on rotating the master key/keyway in the connector shell.
A plug with a given rotation letter will mate with a receptacle with the same rotation letter. Only the master key/keyway rotates in the shell,
and the insert always remains in the same position relative to the minor keys. Refer to diagrams below for each connector series.
LJT (MIL-DTL-38999 Series I) KEY/KEYWAY ROTATION
AB ANGLE OF ROTATION (Degrees)
Shell
Size
Normal°
A°
B°
C°
D°
9
95
77
–
–
113
11
95
81
67
123
109
13
95
75
63
127
115
15
95
74
61
129
116
17
95
77
65
125
113
19
95
77
65
125
113
21
95
77
65
125
113
23
95
80
69
121
110
25
95
80
69
121
110
JT (MIL-DTL-38999 Series II) KEY/KEYWAY ROTATION
AB ANGLE OF ROTATION (Degrees)
Shell
Size
Normal°
A°
B°
C°
D°
8
100
82
–
–
118
10
100
86
72
128
114
12
100
80
68
132
120
14
100
79
66
134
121
16
100
82
70
130
118
18
100
82
70
130
118
20
100
82
70
130
118
22
100
85
74
126
115
24
100
85
74
126
115
Tri-Start (MIL-DTL-38999 Series III) KEY/KEYWAY ROTATION
Shell
Size
9
11, 13,
and 15
17 and
19
21, 23,
and 25
Key & Keyway
Arrangement
Identification Letter
N
A
B
C
D
E
N
A
B
C
D
E
N
A
B
C
D
E
N
A
B
C
D
E
AR°
BSC
105
102
80
35
64
91
95
113
90
53
119
51
80
135
49
66
62
79
80
135
49
66
62
79
BR°
BSC
140
132
118
140
155
131
141
156
145
156
146
141
142
170
169
140
145
153
142
170
169
140
145
153
CR°
BSC
215
248
230
205
234
197
208
182
195
220
176
184
196
200
200
200
180
197
196
200
200
200
180
197
DR°
BSC
265
320
312
275
304
240
236
292
252
255
298
242
293
310
244
257
280
272
293
310
244
257
280
272
NORMAL
BA
D _{C ROTATION}
AB
LETTERS
5_˚ LJT REF
RELATIVE POSSIBLE POSITION
OF ROTATED MASTER KEYWAY
(front face of LJT connector receptacle shown)
NORMAL
BA
D _{C ROTATION}
AB
LETTERS
10_˚ JT REF
RELATIVE POSSIBLE POSITION
OF ROTATED MASTER KEYWAY
(front face of JT connector receptacle shown)
mIL-DTL-38999
Series I LJT & Series II JT
CONNECTORS ALTERNATE
ROTATION CROSS
REFERENCE LETTERS
Pins in
Alternate
Rotations
Sockets in
Alternate
Rotations
PA = E
PB = R
PC = W
PD = Y
SA = F
SB = T
SC = X
SD = Z
Explanation:
Use P at end of part number
for pin contacts in Normal
position. Use S at end of
part number for socket
contacts in Normal position.
Use cross reference letters
given in chart above for
alternate rotations.
MAIN
KEYWAY
AR_˚
BSC
BR_˚
BSC
DR_˚
CR _˚
BSC
BSC
RELATIVE POSSIBLE POSITION
OF ROTATED MASTER KEYWAY
(front face of Tri-Start
connector receptacle shown)
MIL-DTL-38999 SERIES III,
TRI-START CONNECTORS
ALTERNATE ROTATION CROSS
REFERENCE LETTERS
Pins in
Alternate
Rotations
PA = G
PB = I
PC = K
PD = M
PE = R
Sockets in
Alternate
Rotations
SA = H
SB = J
SC = L
SD = N
SE = T
Explanation:
Use P at end of part number
for pin contacts in Normal
position. Use S at end of
part number for socket
contacts in Normal position.
Use cross reference letters
given in chart above for
alternate rotations.
240 Contact Amphenol Aerospace for more information at 800-678-0141 • www.amphenol-aerospace.com