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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Description Datasheet Availability Pricing (JPY) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Number of Positions
Contact Gender
Insert Arrangement
Product
Shell Size
Shell Style
MIL Type
Termination Style
Mounting Style
Current Rating
Contact Plating
Contact Material
Series
Packaging
Amphenol Aerospace Circular MIL Spec Connector TRI-START ALUMINUM
Datasheet
188On Order
Min.: 1
Mult.: 1

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 53P ST PLUG PIN SZ 23
Datasheet
1In Stock
Min.: 1
Mult.: 1
53 Position Pin (Male) 23-53 Plugs 23 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 2P ST PLUG SOC SZ 11
Datasheet
3In Stock
Min.: 1
Mult.: 1
No
2 Position Socket (Female) 11-02 Plugs 11 Straight MIL-DTL-38999 III Crimp Cable 13 A Gold Copper Alloy Composite 38999 Each
Amphenol Aerospace Circular MIL Spec Connector 55P ST PLUG PIN SZ 23
Datasheet
1In 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 Composite 38999
Amphenol Aerospace Circular MIL Spec Connector 56P PLG SZ 25 SKT CBL MNT
Datasheet
4In Stock
Min.: 1
Mult.: 1
No
56 Position Socket (Female) 25-04 Plugs 25 Straight MIL-DTL-38999 III Crimp Cable 7.5 A, 13 A Gold Copper Alloy Composite 38999
Amphenol Aerospace Circular MIL Spec Connector 2P ST PLUG SOC SZ 11
Datasheet
1In Stock
Min.: 1
Mult.: 1
2 Position Socket (Female) 11-02 Plugs 11 Straight MIL-DTL-38999 III Crimp Cable 13 A Gold Copper Alloy Composite 38999 Each
Amphenol Aerospace Circular MIL Spec Connector 2P ST PLUG PIN SZ 11
Datasheet
15In Stock
Min.: 1
Mult.: 1
No
2 Position Pin (Male) 11-02 Plugs 11 Straight MIL-DTL-38999 III Crimp Cable 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 5P SZ 11 PLUG CBL MNT SKT
Datasheet
7In Stock
Min.: 1
Mult.: 1
No
5 Position Socket (Female) 11-05 Plugs 11 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector SHELL 13 22 PIN PLUG;CRIMP TERM
Datasheet
352Expected 9/25/2026
Min.: 1
Mult.: 1
No
22 Position Pin (Male) 13-35 Plugs 13 Straight MIL-DTL-38999 III Crimp Cable 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 22P SIZE 13 STRAIGHT PLUG SKT
Datasheet
8In Stock
Min.: 1
Mult.: 1
No
22 Position Socket (Female) 13-35 Plugs 13 Straight MIL-DTL-38999 III Crimp Cable 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 4P SIZE 13 STRAIGHT PLUG PIN
Datasheet
7In Stock
Min.: 1
Mult.: 1
No
4 Position Pin (Male) 13-04 Plugs 13 Straight MIL-DTL-38999 III Crimp Cable 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 4P ST PLUG SOC SZ 13
Datasheet
2In Stock
Min.: 1
Mult.: 1
No
4 Position Socket (Female) 13-04 Plugs 13 Straight MIL-DTL-38999 III Crimp Cable 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 37P SIZE 15 STRAIGHT PLUG SKT
Datasheet
241On Order
Min.: 1
Mult.: 1
No
37 Position Socket (Female) 15-35 Plugs 15 Straight MIL-DTL-38999 III Crimp Cable 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 26P SIZE 17 STRAIGHT PLUG PIN
Datasheet
7In Stock
Min.: 1
Mult.: 1
No
26 Position Pin (Male) 17-26 Plugs 17 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 26P ST PLUG SOC SZ 17
Datasheet
6In Stock
Min.: 1
Mult.: 1
No
26 Position Socket (Female) 17-26 Plugs 17 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 6P ST PLUG SOC SZ 17
Datasheet
1In Stock
Min.: 1
Mult.: 1
No
6 Position Socket (Female) 17-06 Plugs 17 Straight MIL-DTL-38999 III Crimp Cable 23 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 4P st plug pin SZ 21
Datasheet
8In Stock
Min.: 1
Mult.: 1
No
4 Position Without Pin Contacts 21-75 Plugs 21 Straight MIL-DTL-38999 III Crimp Cable 46 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 55P PLG SZ 23 SKT CBL MNT
Datasheet
32In Stock
Min.: 1
Mult.: 1
No
55 Position Socket (Female) 23-55 Plugs 23 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 19P st plug soc sz 25
Datasheet
7In Stock
Min.: 1
Mult.: 1
No
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 30P SIZE 25 STRAIGHT PLUG PIN
Datasheet
20In Stock
128Expected 10/12/2026
Min.: 1
Mult.: 1
No
30 Position Pin (Male) 25-20 Plugs 25 Straight MIL-DTL-38999 III Crimp Cable 7.5 A, 13 A, 23 A, 46 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 29P PLG SZ 25 SKT CBL MNT
Datasheet
7In Stock
Min.: 1
Mult.: 1
No
29 Position Socket (Female) 25-29 Plugs 25 Straight MIL-DTL-38999 III Crimp Cable 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 37P STRT CABLE PLUG PIN CRIMP SZ 25
Datasheet
6In Stock
Min.: 1
Mult.: 1
No
37 Position Pin (Male) 25-37 Plugs 25 Straight MIL-DTL-38999 III Crimp Cable 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 2P FM SZ 11 PIN WL MNT
Datasheet
100Expected 8/24/2026
Min.: 1
Mult.: 1

2 Position Pin (Male) 11-02 Receptacles 11 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 37P RCPT SZ 15 SKT WL MNT
Datasheet
1In Stock
Min.: 1
Mult.: 1

37 Position Without Socket Contacts 15-35 Receptacles 15 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 37P SIZE 15 WALL MOUNT RECEPTACLE PIN
Datasheet
25Expected 10/23/2026
Min.: 1
Mult.: 1

37 Position Pin (Male) 15-35 Receptacles 15 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum