MIL-DTL-38999 Series III Connectors

Amphenol MIL-DTL-38999 Series III Circular Connectors deliver high-performance capabilities for demanding general duty and harsh environment applications. Developed to operate under severe high temperature and vibration, the connectors feature rapid coupling via a Tri-Start™ thread, shell-to-shell, or metal-to-metal bottoming. Amphenol designed these connectors to provide an EMI shielding capability of 65dB minimum at 10GHz and corrosion resistance of up to 500-hour salt spray exposure. Amphenol MIL-DTL-38999 Series III Circular Connectors offer a rated current range of 1.5A to 5A, a temperature range of -65°C to +175°C, minimum insulation resistance of 5000MΩ, and a dielectric withstanding voltage of 1000VRMS. These rugged and highly reliable circular connectors are ideally suited for industrial, commercial air, military, C4ISR, and space applications.

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Qty. RoHS ECAD Model Number of Positions
Contact Gender
Insert Arrangement
Product
Shell Size
Shell Style
MIL Type
Termination Style
Mounting Style
Current Rating
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Contact Material
Series
Packaging
Amphenol Aerospace Circular MIL Spec Connector 66P SIZE 19 PIN CABLE MOUNT
Datasheet
51In Stock
191On Order
Min.: 1
Mult.: 1
No
66 Position Pin (Male) 19-35 Plugs 19 Straight MIL-DTL-38999 III Crimp Cable 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 66P SZ 19 CBL MNT SOC
Datasheet
3In Stock
Min.: 1
Mult.: 1
No
66 Position Socket (Female) 19-35 Plugs 19 Straight MIL-DTL-38999 III Crimp Cable 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 16P SIZE 21 STRAIGHT PLUG PIN
Datasheet
23In Stock
Min.: 1
Mult.: 1
No
16 Position Pin (Male) 21-16 Plugs 21 Straight MIL-DTL-38999 III Crimp Cable 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 16P SIZE 21 STRAIGHT PLUG SKT
Datasheet
10In Stock
Min.: 1
Mult.: 1
No
16 Position Socket (Female) 21-16 Plugs 21 Straight MIL-DTL-38999 III Crimp Cable 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 39P SIZE 21 STRAIGHT PLUG SKT
Datasheet
9In Stock
Min.: 1
Mult.: 1
39 Position Socket (Female) 21-39 Plugs 21 Straight MIL-DTL-38999 III Crimp Cable 7.5 A, 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 41P SIZE 21 STRAIGHT PLUG PIN
Datasheet
8In Stock
50Expected 2026/02/24
Min.: 1
Mult.: 1
No
41 Position Pin (Male) 21-41 Plugs 21 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum Bulk
Amphenol Aerospace Circular MIL Spec Connector 41P SIZE 21 STRAIGHT PLUG SKT
Datasheet
6In Stock
Min.: 1
Mult.: 1
No
41 Position Socket (Female) 21-41 Plugs 21 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 4P SIZE 21 STRAIGHT PLUG SKT
Datasheet
6In Stock
Min.: 1
Mult.: 1
No
4 Position Socket (Female) 21-75 Plugs 21 Straight MIL-DTL-38999 III Crimp Cable 46 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 100P SIZE 23 STRAIGHT PLUG PIN
Datasheet
15In Stock
Min.: 1
Mult.: 1
100 Position Pin (Male) 23-35 Plugs 23 Straight MIL-DTL-38999 III Crimp Cable 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector PLUG CRIMP TERM
Datasheet
87In Stock
Min.: 1
Mult.: 1
No
100 Position Pin (Male) 23-35 Plugs 23 Straight MIL-DTL-38999 III Crimp Cable 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector SHELL 23 100 PIN PLUG;CRIMP TERM
Datasheet
19In Stock
50Expected 2026/04/27
Min.: 1
Mult.: 1
No
100 Position Socket (Female) 23-35 Plugs 23 Straight MIL-DTL-38999 III Crimp Cable 5 A Gold Copper Alloy 38999 Aluminum Bulk
Amphenol Aerospace Circular MIL Spec Connector 55P PLG SZ 23 PIN CBL MNT
Datasheet
9In Stock
Min.: 1
Mult.: 1
No
55 Position Pin (Male) 23-55 Plugs 23 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum Bulk
Amphenol Aerospace Circular MIL Spec Connector 19P PLG SZ 25 SKT CBL MNT
Datasheet
9In Stock
Min.: 1
Mult.: 1
19 Position Socket (Female) 25-19 Plugs 25 Straight MIL-DTL-38999 III Crimp Cable 23 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 24P SIZE 25 CABLE MOUNT SOCKET
Datasheet
3In Stock
Min.: 1
Mult.: 1
No
24 Position Socket (Female) 25-24 Plugs 25 Straight MIL-DTL-38999 III Crimp Cable 13 A, 23 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 128P PLG SZ 25 PIN CBL MNT
Datasheet
4In Stock
Min.: 1
Mult.: 1
128 Position Pin (Male) 25-35 Plugs 25 Straight MIL-DTL-38999 III Crimp Cable 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 128P SIZE 25 STRAIGHT PLUG PIN
Datasheet
77In Stock
Min.: 1
Mult.: 1
No
128 Position Pin (Male) 25-35 Plugs 25 Straight MIL-DTL-38999 III Crimp Cable 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 43P st plug soc sz 25
Datasheet
9In Stock
Min.: 1
Mult.: 1
No
43 Position Socket (Female) 25-43 Plugs 25 Straight MIL-DTL-38999 III Crimp Cable 7.5 A, 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 7P SIZE 25 STRAIGHT PLUG SOCKET
Datasheet
6In Stock
Min.: 1
Mult.: 1
No
99 Position Socket (Female) 25-07 Plugs 25 Straight MIL-DTL-38999 III Crimp Cable 5 A, 46 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector SZ 23;100 PIN CRIMP WL MNT RECPT
Datasheet
6In Stock
Min.: 1
Mult.: 1
100 Position Socket (Female) 23-35 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector SHELL 9 6 PIN W MNT RECPT CRMP
Datasheet
46In Stock
56Expected 2026/04/14
Min.: 1
Mult.: 1
6 Position Pin (Male) 09-35 Receptacles 9 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum Bulk
Amphenol Aerospace Circular MIL Spec Connector 6P RCPT SZ 9 PIN WL MNT
Datasheet
14In Stock
25Expected 2026/05/18
Min.: 1
Mult.: 1
No
6 Position Pin (Male) 09-35 Receptacles 9 Wall Mount MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy Composite 38999
Amphenol Aerospace Circular MIL Spec Connector 6P RCPT SCKT
Datasheet
21In Stock
Min.: 1
Mult.: 1
No
6 Position Socket (Female) 09-35 Receptacles 9 Wall Mount MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy Composite 38999
Amphenol Aerospace Circular MIL Spec Connector 13P RCPT SZ 11 SKT WL MNT
Datasheet
38In Stock
Min.: 1
Mult.: 1
No
13 Position Socket (Female) 11-35 Receptacles 11 Wall Mount MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy Composite 38999
Amphenol Aerospace Circular MIL Spec Connector 22P FM SZ 13 PIN WL MNT
Datasheet
16In Stock
Min.: 1
Mult.: 1
No
22 Position Pin (Male) 13-35 Receptacles 13 Wall Mount MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy Composite 38999
Amphenol Aerospace Circular MIL Spec Connector 18P SIZE 15 WALL MOUNT RECEPTACLE PIN
Datasheet
17In Stock
Min.: 1
Mult.: 1
No
18 Position Pin (Male) 15-18 Receptacles 15 Wall Mount MIL-DTL-38999 III Crimp Panel 7.5 A Gold Copper Alloy Composite 38999