ITT Cannon’s MIL-DTL-38999 Series I, II, III Connectors are designed to tackle the most extreme conditions
with exceptional versatility in the harshest environments. Small, lightweight and highly reliable, our D38999
connectors deliver consistency and performance when it matters most.
D38999 Series I (KJL)
ITT Cannon KJL series MIL-DTL-38999 series I connectors offer high-density contact
arrangements in a light-weight miniature circular connector. ITT Cannon KJL series
connectors are an industry standard for military and aerospace applications. The
environmentally sealed KJL series features quick-mating, three-point bayonet coupling
and operates across a wide temperature range.
D38999 Series II (KJ)
ITT Cannon KJ series MIL-DTL-38999 series II are a weight-reduced and low profile
circular connector ideally suited for avionic applications where space and weight are
prime considerations. It offers high-density contact arrangements in a light-weight
miniature circular connector. ITT Cannon KJ series connectors feature a quick-mating,
three-point bayonet coupling, are environmentally-sealed and operate across a wide
temperature range. ITT Cannon KJ series mil spec connectors were originally designed
for military vehicles and are now industry standard aerospace and military connectors.
MIL-DTL-38999 Series III (KJB)
The de-facto standard circular connector for use in harsh military and aerospace
environments, ITT Cannon KJB series MIL-DTL-38999 series III Connectors offer
high-density contact arrangements in a light-weight miniature circular connector.
ITT Cannon KJB series connectors have quick-mating, triple-lead threaded, self-locking
coupling, are environmentally-sealed and operate across a wide temperature range.
ITT Cannon KJB series connectors were originally designed for military vehicles and
are now industry standard aerospace and military connectors.
MIL-DTL-38999 Series III Composite (KJB)
A lightweight standard circular connector for use in military and aerospace environments
with significant weight savings over aluminium-bodied D 38999. High density layouts
with up to 128 data connections and power contacts rated up to 23A. Features a
triple-start coupling with anti-decoupling ratchet for high vibration applications, Cadmium
and Electroless Nickel platings, 100 percent scoop-proof contacts and rated to 1500
mating cycles. Qualified to stringent MIL-DTL-38999 Series III Composite specifications.
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
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Table of Contents
Specifications and Test Data ..........................................................................................................................................3-5
MIL-DTL-38999 Series I ..................................................................................................................................................6-9
MIL-DTL-38999 Series II .................................................................................................................................................10-15
MIL-DTL-38999 Series III ................................................................................................................................................16-18
MIL-DTL-38999 Series III Composite..............................................................................................................................19-20
Product Safety and Warranty ..........................................................................................................................................35
About ITT Cannon ...........................................................................................................................................................36
In addition to our MIL-DTL-38999 series, we also offer these connectivity solutions:
Combo D-Sub
Product offering includes ability to integrate signal
and coax, high power, and high voltage.
CA-Bayonet –
Signal and power connectors with exceptional
sealing against the ingress of fluids and will withstand the effects
of high vibrations.
Microminiature –
High performance and reliability with exceptional
versatility. Available in rectangular, circular and strip configurations,
many of our connectors meet or exceed the applicable requirements
of the MIL-DTL-83513 specification.
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
2
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MIL-DTL-38999 Series I, II, III Connectors
SERIES I
GROUNDING FINGERS
(Standard on Series I connector)
SERIES II
SHELL HARDWARE
is aluminum alloy
MONOBLOC
INSERT
WIRE SEALING
GROMMET
HIGH STRENGTH
MULTIPLE-TINE
METAL RETAINING CLIP
assures positive retention with
inwardly deflected tines that lock
securely behind contact shoulder
SERIES III
CLOSED ENTRY
SOCKET CONTACT
DESIGN
INSULATOR
TO SHELL SEAL
HIGH STRENGTH
MULTIPLE-TINE
METAL RETAINING CLIP
assures positive retention with
inwardly deflected tines that lock
securely behind contact shoulder
SIMPLE, STRONGER
CONTACTS
are designed to resist
bending and are
crimp terminated
WIRE SEALING
GROMMETS
PERIPHERAL
SEALING
GASKET
INSULATOR
TO SHELL SEAL
WIRE SEALING
GROMMETS
SIMPLE, STRONGER
CONTACTS
are designed to resist
bending and are
crimp terminated
PERIPHERAL
SEALING
GASKET
CLOSED ENTERY
SOCKET CONTACT
DESIGN
INTERFACIAL
SEAL
PERIPHERAL SEAL
around the connector interface is
designed to minimize compression
set when connectors are mated
SIMPLER, STRONGER
CONTACTS
are designed to resist bending
and are crimp terminated
HIGH STRENGTH
MULTIPLE-TINE
METAL RETAINING CLIP
assures positive retentin with
inwardly deflected tines that lock
securely behind contact shoulder
GROUNDING FINGERS
RESILIENT PIN
INTERFACIAL SEALS
feature individual raised seal
barriers around each pin contact
INTERFACIAL
SEAL
• Corrosion and zinc resistant shells of aluminum
alloy with cadmium and zinc over nickel plating
withstand a 500 hour salt spray exposure
• Rear release crimp snap-in contacts
• High contact density
• Standard MIL-C-39029 contacts, MIL-I-81969
application tools and MIL-STD 1560 insert
arrangements
•
•
•
•
Special/custom capabilities
100% scoop-proof - Series I and III
Light weight /Low Profile - Series II
Operates under severe high temperature vibration
testing through 200 C - engineered for high densi-
ty circuitry - Series III
• Interfacial seal helps prevent electrolytic erosion of
contacts - Series III
• Superior EMI shielding provides outstanding pro-
tection up to 65dB at 10 GHZ. - Series III
Specification Comparison
Design Criteria
Low Profile/Light Weight
Scoop Proof
Coupling System
Electrolytic Erosion
Durability (Cycles)
High Impact Shock
External Bending Moment
Shell Size 25
Random Vibration "J"
Sine Vibration
Sand, Dust, Ice
Shell Size
650 in/lbs
49.5G, Ambient
60G
yes
9-25
8-24
150 in/lbs
43.7G, Ambient
1000 in/lbs
49.5G, Ambient
60G
yes
9-25
1000 in/lbs
49.5G, Ambient
60G
yes
9-25
Series I
no
yes
Bayonet
no
500
yes
Series II
yes
no
Bayonet
no
250
no
Series III (Aluminum)
no
yes
Triple Start Thread
yes
500
yes
Series III (Composite)
yes
yes
Triple Start Thread
yes
1500
yes
Contact Rating
Crimp Well Data
Contact
Size
22D
22M**
22**
20
16
12
Test Current
DC Test Amperage
5
3
5
7.5
13
23
Maximum
Millivolt Drop*
40
30
40
35
25
25
Well
Diameter
.0345 ± .0010
.0280 ± .0010
.0365 ± .0010
.0470 ± .0010
.0670 ± .0010
.1000 ± .0020
Well
Depth
.157/.141
.157/.141
.157/.141
.229/.209
.229/.209
.229/.209
* Maximum millivolt drop data is determined by measuring resistance of mated contacts from end to en
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