38999 SERIES III AND IV CONNECTORS
RUGGED CIRCULAR CONNECTORS IN MIL-SPEC AND
DERIVATIVE CONFIGURATIONS TO MEET THE WIDEST RANGE
OF HARSH ENVIRONMENTS AND APPLICATIONS
AEROSPACE, DEFENSE & MARINE / 38999 SERIES III AND IV CONNECTORS
38999 Series III and IV Connectors
Subminiature Circular Connectors Built for
Harsh Environments
TE Connectivity (TE) is your one-stop source for MIL-DTL-38999
and 38999-style connectors. We offer mil-qualified Series III and
IV connectors in a wide array of configurations, materials and
finishes to help meet the needs of ground, aerospace, and marine
applications. The subminiature circular connectors are time tested
for reliability in harsh environments. Our 38999 connectors include
support for:
• Signals
• Power
• RF
• Optical
• Hermetic sealing
• EMI filtering
Beyond Mil Specs
Because of the widespread popularity of 38999 Series III
connectors, we have also used this form factor for designs to meet
a variety of configurations beyond those of MIL-DTL-38999. This
gives you a familiar, reliable connector and access to the full range
of backshells and other accessories.
AEROSPACE, DEFENSE & MARINE / 38999 SERIES III AND IV CONNECTORS
PAGE 2
38999 Series III and IV Connectors
Recent 38999 Highlights
RoHS-Compatible Finishes
Our 38999-qualified connectors are available
with cadmium-free, environment-resisting plating
options offering 500-hour salt spray resistance and
a -65°C to +175°C temperature range.
Class T: Nickel-PTFE
Class Z: Black zinc nickel
PC Board-Mount Connectors
TE offers hundreds of different sizes and types
of standard and extended-tail contacts. Direct
board mounting not only saves weight and space,
it enhances system reliability and performance by
replacing a separable interface with a more reliable
soldered interconnection.
MC801 Connectors
Expanding your options from our already broad
fiber-optic portfolio, MC801 connectors combine
a 38999 shell with the capability to use industrystandard 801 optical termini. We support a full
range of interface styles to help allow you to
achieve the full benefits of fiber’s bandwidth, reach,
and noise immunity.
CeeLok FAS-X Connectors
Take control of high-speed networking with
connectors that support up to four 10G Ethernet
channels with excellent signal integrity. Using
standard 39029 contacts, the connectors can be
field terminated using standard tools.
AEROSPACE, DEFENSE & MARINE / 38999 SERIES III AND IV CONNECTORS
PAGE 3
38999 Series III and IV Connectors
MIL-DTL-38999 Connectors
Series III
Series IV
Coupling Mechanism
Threaded
360° turn
Breech lock
1/4 turn
Shell Materials
Stainless steel
Aluminum
Composite
Aluminum
Shell Sizes
9, 11, 13, 15, 17,
19, 21, 23, 25
11, 13, 15, 17,
19, 21, 23, 25
Features
Scoop proof
Environmentally sealed
Hermetic versions
Filter versions
Spring fingers for EMI control
Shell Platings
Olive drab cadmium
Passivated
Electroless nickel
Electrodeposited nickel
Nickel PTFE (Series III)
Black zinc nickel (Series III)
Contact Sizes, Std.
23, 22, 20, 16, 12, 8
No. of Signal Contacts, Max.
187
Contact Type
SAE AS39029
Contact Styles
Crimp
Solder cup or eyelet
PCB tail
Operating Temperatures
-65°C to +200°C
-65°C to +175°C
-65°C to +150°C
(Depends on shell finish)
Durability (Mating Cycles)
500
1500 for ACT Composite Connectors
Plugs
Straight, with or without EMI spring fingers
Lanyard release
Standard Configurations
Receptacles
Box mounting, both front and rear panel mounting
Wall mounting, both front and rear panel mounting
Jam nut, rear panel mounting
Solder mounting
Through-bulkhead
AEROSPACE, DEFENSE & MARINE / 38999 SERIES III AND IV CONNECTORS
PAGE 4
38999 Series III and IV Connectors
MIL-DTL-38999 CONNECTORS
Extreme Environments
• - 65°C to +200°C operating
temperature
• W
ithstands high vibration
and shock
• C
orrosion-resistant stainless
steel shell
• Fire tested to +1093°C
DTS-K and –S Series
Connectors
MIL-DTL-38999
Series III
Classes K and S
Typical Applications
• E
ngines in ground vehicles,
aerospace, and UAVs
• H
igh-temperature, highvibration areas
Triple-start, self-locking
threaded coupling
• Disconnect: 360° turn
Capable
• Light weight
• VG 95319 qualified
• EN3645 qualified
DTS Series
Connectors
MIL-DTL-38999
Series III
Weight Saving
• Lightweight composite shell
Typical Applications
• C
ommercial and military
aerospace
• UAVs
Typical Applications
• Ground, aerospace, and marine
• Most widely used 38999 style
Breech lock coupling
• Q
uick connect/disconnect:
Quarter turn
Rugged
• - 65°C to +200°C operating
temperature
• E
xcellent corrosion resistance:
withstands 2000-hour salt spray
• U
p to 1500-mating-cycle
durability
ACT Series Connectors
MIL-DTL-38999
Series III
Composite Shells
Versatile
• More choice in shell sizes,
materials, inserts, filtering and
EMI protection, and
environmental sealing
High Performance
• Optimized for SWAMP
area applications
• Visual, audible and tactile
full-mate indicators
DIV Series
Connectors
MIL-DTL-38999
Series IV
Typical Applications
• Missiles
• Aircraft
• Ground vehicles
Instant Disconnection
• Designed for munitions stores
• MIL-DTL-38999/31 qualified
Lanyard-Release
Plugs
MIL-DTL-1760
38999-DERIVED CONNECTORS
High Density
• N
early double the contact density
of standard M38999 connectors
• Five shell sizes, 11 to 118 contacts
• 3 amps per contact
Wildcat 38999
High-Density
Connectors
Lightweight and Space Saving
• Aerospace grade aluminium
• R
ear removable crimp and
PCB contacts
• - 65°C to +175°C / +200°C
(plating dependent)
Typical Applications
• Universal soldier
• UAV
• Communications
MIL-DTL-1760 Types 1 and 2
• Type 1 available in aluminum
and composite versions for
drop launch
• Type 2 incorporates a
replaceable buffer system for
rail launch
Typical Applications
• Ground and air-launched
missiles
• Smart bombs
Reduced Profile
• Based on 38999 Series I
coupling interface lengths
and Series II diameters
• Meets LN29729 standard
• Meets J 62.017 and DIN
65002 standards
• -55°C to +175°C operating
temperature
HDJ Series
Connectors
38999 Series 1.5
AEROSPACE, DEFENSE & MARINE / 38999 SERIES III AND IV CONNECTORS
Typical Applications
• Military aerospace
PAGE 5
38999 Series III and IV Connectors
38999-DERIVED CONNECTORS
Designed for Marine Applications
• M
arine bronze shell for marine
applications
• Excellent corrosion resistance
• D
ry mate sealing down to
4 m immersion
• - 65°C to +175°C operating
temperature
DTS-B Series
Connectors
38999 Series III
Bronze Shells
Compliant
• STD CECC 75201-002
• RoHS compliant
Typical Applications
• Shipboard
• Ground vehicles
MC3
• 5, 8, or 12 fibers (shell size 19,
23, or 25)
• Aluminum shell
• 2.5 mm termini
MC3 shown
MC3 and MC4
Optical Connectors
MC5
• 1 , 2, 4, 6, 8, 10, 18, 30 fibers
(shell sizes 11 through 25)
• Composite shell
• 1.25 mm termini
MC6 shown
D38999 Series III
QPL Fiber-Optic
Connectors
High Performance
• Uses industry-standard
ARINC 801 termini
• 1.25 mm ferrules for high
contact density
• Multimode and single mode
• PC and APC finishes
MC6
• 12 or 24 fibers
• Composite shell
• MT ferrules
Lightweight
• Aluminum shell
MC801 Optical
Connectors
MC5 and MC6
Optical Connectors
Convenient
• Compatible with LC
termination processes
and tooling
Capable
• Up to 36 fibers
• M
IL-PRF-29504/4 and
/5 termini
Versatile
• Expanded beam for size 11
and 15 shells
• 1, 2, 4, or 8 fibers
Rugged
• A
luminum or
composite shells
• S
hock and vibration resistant
• M
oisture and corrosion
resistant
Durable
• No wear on fiber optic
interface
• Vibration resistant
• Highly resistant to dirt
and debris
PRO BEAM Inserts
Convenient
• E
xpanded beam termini for 38999
Series III size 16 cavities
High Current Capacity
• Up to 1000 A in a size 25 shell
• Single and multicontact
configurations
Durable
• No wear on fiber optic interface
• Very vibration resistant
• Highly resistant to dirt and debris
PRO BEAM EB16
Termini
MC4
• 2 fibers (shell size 9)
• Aluminum shell
• 2.5 mm termini
Repeatable Low-Loss Performance
• L
ow sensitivity to thermal
fluctuations and interface
contamination
• Stable operation over life of system
Space Saving
• Hybrid configurations with
signal and power contacts
• Variety of shell sizes
High-Power 38999Style Connectors
Easy To Use
• Drop-in replacement for M29504/4
and /5 physical contact termini
AEROSPACE, DEFENSE & MARINE / 38999 SERIES III AND IV CONNECTORS
Rugged
• Rear removable crimp contacts
• Dedicated sealed backfitting
and cable support grommet
• Excellent contact retention
under severe vibration
PAGE 6
38999 Series III and IV Connectors
38999-DERIVED CONNECTORS
Versatile
• RJ45, with Cat 5e, 6, or
6A performance
• USB 2.1, up to 480 Mb/s
• USB 3.0, up to 5 Gb/s
• SIM card receptacle
• Micro SD card receptacle
• LC, for multimode and singlemode fiber
Simple, Reliable Wire Bussing
• Internal pc board connects
contacts for grounding
distribution, power
distribution, and similar needs
• Range
of standard
and custom bussing
configurations
CBC Series Bussed
Connectors
Weight and Space Saving
• Composite
and
aluminum shells
• Eliminates
external
bussing components
• S
hell sizes 9 through 25
Ruggedized
Commercial
Connectors
High Performance
• Glass-to-metal sealing
• A
irtight under high pressures,
vibration, and temperatures
Hermetic
Connectors
Quadrax Connectors
Rugged
• R
esists extreme changes in
temperature or pressure
• -65°C to 200°C
• W
ide range of special
configurations
Typical Applications
• Pressurized systems
• F
uel tanks and other
hazardous materials
• Harsh environments
EMI Protection
• Pi, LC, CL, C configurations
• Mixed capacitance, grounded
or feedthrough lines
• Filter values from 100 pF
to 1 μF, subject to specific
requirements
Filter Connectors
EMP Protection
• Transient voltage suppression
• Resists EMP, NEMP, lightning
strike, or ESD
• Fast transient clamping
High Speed, High Density
• U
p to 8 Quadrax contacts in
a size 25 shell
• One
Quadrax contact in a
size 9 shell
• Integral ground plane
High Speed
• Supports 10G Ethernet
and beyond
• One 10G Ethernet channel in
size 11 shell
• Four channels in size 25 shell
Rugged
• H
igh-strength aluminum alloy
shell
• Nickel,
zinc cobalt, or olive
drab cadmium plating
• 3
60° shielding
• - 65°C to +175°C
Compatible
• AS39029 contacts
• Fast field termination and
repair, using standard tools
• Available with aluminum
or composite shells with a
variety of finishes
CeeLok FAS-X
Connectors
Typical Applications
• High-speed networking
Typical Applications
• High-speed networking
Convenient
• S
uited to bulkhead pass-through
and connector-saver applications
• W
ide range of gender matching,
materials, and sizes
Feedthrough
Connectors
Rugged
• Shell options include
aluminum, bronze, stainless
steel, titanium, and composite
• Sealed up to IP68 for fluid and
dust-laden environments
Wide Backshell Range
• AS85049-compliant band straps
and adapters
• Available in all materials
and finishes
• Straight, 45°, or 90°
• Options on low profile, extended
length and alternative angles
Backshells and
Accessories
AEROSPACE, DEFENSE & MARINE / 38999 SERIES III AND IV CONNECTORS
Shielded or Unshielded
• Shielded for individual or overall
360° screening options
Compatible
• Compatible with Mil-Spec
dimensions and performance
PAGE 7
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QUALITY STARTS WITH THE RIGHT APPLICATION TOOLING
Creating a quality crimp connection is essential to delivering high performance and reliability in extreme environments. From low
to high volume wire processing, TE has you covered with a full range of application tooling and a global field service team.
• View all application tooling
• Connect with our experts to find the right tool for your application
te.com/38999
AMP, AGASTAT, CeeLok FAS-X, CII, DEUTSCH, DRI, HARTMAN, KILOVAC, LL ROWE, MICRODOT, NANONICS,
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or licensed by TE Connectivity. All other logos, products and/or company names referred to herein might be
trademarks of their respective owners.
The information given herein, including drawings, illustrations and schematics which are intended for illustration
purposes only, is believed to be reliable. However, TE Connectivity makes no warranties as to its accuracy or
completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be
as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in no case will
TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use
or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the
suitability of each such product for the specific application.
© 2023 TE Connectivity All Rights Reserved.
1-1773858-4 05/23
AEROSPACE, DEFENSE & MARINE / 38999 SERIES III AND IV CONNECTORS
38999 SERIES III AND IV
CONNECTORS
TE Connectivity
Aerospace, Defense & Marine
2900 Fulling Mill Road
Middletown, PA 17057
