MIL-DTL-38999, Series I LJT, II JT, III TV, HD
Insert Availability and Identification Chart
MIL-DTL-
27599
JT/LJT
Solder
38999
Crimp
Service Total
Rating
Contact Size
Hermetics
Series Series
Series Military
III
4
23 22D 22M 22 20 16 16 12 12
10
8
8
8††
H
Y
TV*
JT II
20-2
LJT I
TV III
III
HD
(Cx)
(Cx) (Power) (Power) (Cx) (Twinax)
X
X
3
X
X
II
I
M
I
65
11
65
21-2n
20-11n
11
4
21-11H 21-11H
G11
G16
SJT
Access
Aquacon
20-16
X
X
P/S P/S
II
16
16
21-16H 21-16H
21-25n
21-27n
X
P
P
P
I
I
I
25
27
27
25
27
19
X
21-29
X
X
X
X
X
X
X
4
2
20-35
20-39
20-41
P
P
M
79
39
41
79
17
21-35
21-39
21-41
21-35
21-39
G35
G39
G41
P/S P/S
P
P
P
X
X
X
X
P
P
P
P
P
P
I
37
41
I
21-41
P/S P/S
21-48n
M
4
4
4
21-75H 21-75HG
21-79n 21-79n
21-121n
G75
2
2
X
X
N
M
4
2
(4)
(2)
II
N
19
121 121
22-1
22-2
X
X
X
X
P
P/S P/S
M
100
100
23-1
P
P
P
P
P
P
X
X
X
M
M
I
85
6
85
23-2
23-6Hn 23-6Hn
6
u
u
22-14n
22-21
22-32
2
2
14
14
23-14n 23-14n
23-21H 23-21H
X
X
X
X
X
X
X
X
P
P
P
P
P
P
P
II
21
21
H21
P
I
I
32
34
32
34
23-32n
23-34n
22-35
X
X
P
X
X
X
X
S
P/S P/S
M
100
100
23-35
23-53
23-35
H35
H53
P
P
P
P
22-53n
I
M
I
53
53
55
53
55
23-53
23-54 n
X
X
P/S P/S
40
49
9
4
22-55
P
P
23-55
23-55
23-63 n
H55
P
M
II
II
57
16
11
4
4
23-97n
23-99n
X
X
16
11
23-151 n
N
151 151
24-1
24-2
24-4
X
X
X
X
X
X
X
u
P
P
P
P
M
M
I
128
100
56
128
25-1
25-2
100
P
P
48
8
25-4
25-7n
25-4
25-7
25-8H
25-11*** J11
25-16n
J4
J7
J8
P
P
M Twx 99
Twinax
N
M
M
97
36
2
8
11
8
8
6
3
u
u
2
2
2
6
9
2
u
X
X
25-17n
42
24-19n
P
P
I
19
30
19
25-19H 25-19H
25-20n 25-20*** J20
J19
N
10 13
4
X
+
Completely tooled.
Majority of tooling is completed
HD designates High Density 38999 Series III insert patterns which use
size 23 contacts only. Not rated over 175°C.
(contact Amphenol Aerospace for availability).
**
Two size 16 contacts dedicated to fiber optics. See the Fiber Optic
Section for more information.
u
P
S
Not tooled for 02-R.
***
†
For use in MIL-STD-1760 applications (see pages 75 and 76).
For RG 180/U and RG 195/U cables only.
Available with Pin contacts only
Available with Socket contacts only
††
(2)
(3)
(4)
Size 8 Coax and Twinax are interchangeable.
P/S Available with Pin contacts or Socket contacts
Not Tooled for RP or 02RE
Hꢀ
Ground plane proprietary option available. Arrg. 9-5, 26-62 is exclusively
ground plane type.
Pin inserts only, not tooled for RP or 02RE (Consult Amphenol for avail.)
MS connector 21-75 is supplied with size 8 twinax.
Commercial connector 21-75 is supplied with size 8 coax.
MS Connector 21-79 has provision for two size 8 coax contacts.
Coax contacts are not supplied unless specified by customer.
n
Not Mil-Qualified.
G
21-75 is Mil-Qualified with twinax contacts only.
Hermetic inserts - solder termination standard. (Contact Amphenol
Aerospace for optional PCB or eyelet termination).
*
(5)
(PWR) Suffix at end of part number to replace coax, twinax, and fiber contacts
with power contacts.
4
Contact Amphenol Aerospace for more information at 800-678-0141 • www.amphenol-aerospace.com