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 (EUR) 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 26P WL MNT SOC SZ 17
Datasheet
4In Stock
Min.: 1
Mult.: 1
No
26 Position Socket (Female) 17-26 Receptacles 17 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 26P RCPT SZ 17 SKT WL MNT
Datasheet
5In Stock
Min.: 1
Mult.: 1
No
26 Position Socket (Female) 17-26 Receptacles 17 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 39P RCPT SZ 17 SKT WL MNT
Datasheet
16In Stock
Min.: 1
Mult.: 1
No
39 Position Socket (Female) 17-02 Receptacles 17 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A, 46 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 55P WALL MT RCPT
Datasheet
5In Stock
Min.: 1
Mult.: 1
No
55 Position Pin (Male) 17-35 Receptacles 17 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 6P WL MNT SOC SZ 17
Datasheet
5In Stock
Min.: 1
Mult.: 1
No
6 Position Socket (Female) 17-06 Receptacles 17 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 23 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 8P WL MNT PIN SZ 17
Datasheet
7In Stock
Min.: 1
Mult.: 1
No
8 Position Pin (Male) 17-08 Receptacles 17 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 8P WL MNT PIN SZ 17
Datasheet
8In Stock
Min.: 1
Mult.: 1
No
8 Position Pin (Male) 17-08 Receptacles 17 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 23P FM SZ 17 PIN WL MNT
Datasheet
1In Stock
Min.: 1
Mult.: 1
No
23 Position Pin (Male) 17-99 Receptacles 17 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 7.5 A, 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 11P WL MNT PIN SZ 19
Datasheet
1In Stock
Min.: 1
Mult.: 1
No
11 Position Pin (Male) 19-11 Receptacles 19 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector TRI-START ALUMINUM
Datasheet
13In Stock
100Expected 10/23/2026
Min.: 1
Mult.: 1
No
11 Position Pin (Male) 19-11 Receptacles 19 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 32P RCPT SZ 19 PIN WL MNT
Datasheet
3In Stock
Min.: 1
Mult.: 1
No
32 Position Pin (Male) 19-32 Receptacles 19 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 66P SIZE 19 WALL MOUNT RECEPTACLE PIN
Datasheet
2In Stock
Min.: 1
Mult.: 1
No
66 Position Without Pin Contacts 19-35 Receptacles 19 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 11P FM SZ 21 SKT WL MNT
Datasheet
2In Stock
Min.: 1
Mult.: 1
No
11 Position Socket (Female) 21-11 Receptacles 21 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 23 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 16P RCPT SZ 21 SCKT WL MNT
Datasheet
2In Stock
Min.: 1
Mult.: 1
No
16 Position Without Socket Contacts 21-16 Receptacles 21 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 16P WL MNT SOC SZ 21
Datasheet
2In Stock
Min.: 1
Mult.: 1
No
16 Position Socket (Female) 21-16 Receptacles 21 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 79P FM SZ 21 SKT WL MNT
Datasheet
1In Stock
Min.: 1
Mult.: 1
79 Position Socket (Female) 21-35 Receptacles 21 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 41P WL MNT SOC SZ 21
Datasheet
2In Stock
Min.: 1
Mult.: 1
No
41 Position Socket (Female) 21-41 Receptacles 21 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 7.5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 4P WL MNT PIN SZ 21
Datasheet
7In Stock
Min.: 1
Mult.: 1
No
4 Position Without Pin Contacts 21-75 Receptacles 21 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 46 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 4P RCPT SZ 21 SKT WL MNT
Datasheet
3In Stock
Min.: 1
Mult.: 1
No
4 Position Without Socket Contacts 21-75 Receptacles 21 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 46 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 21P FM SZ 23 PIN WL MNT
Datasheet
4In Stock
3Expected 9/14/2026
Min.: 1
Mult.: 1
No
21 Position Pin (Male) 23-21 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 21P SIZE 23 WALL MOUNT RECEPTACLE SKT
Datasheet
13In Stock
Min.: 1
Mult.: 1
No
21 Position Socket (Female) 23-21 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 100P FM SZ 23 PIN WL MNT
Datasheet
2In Stock
152On Order
Min.: 1
Mult.: 1
No
100 Position Pin (Male) 23-35 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 53P RCPT SZ 23 PIN WL MNT
Datasheet
1In Stock
3Expected 9/14/2026
Min.: 1
Mult.: 1
No
53 Position Pin (Male) 23-53 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 53P FM SZ 23 SCKT WL MNT
Datasheet
2In Stock
Min.: 1
Mult.: 1
No
53 Position Socket (Female) 23-53 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 53P FM SZ 23 SKT WL MNT
Datasheet
10In Stock
Min.: 1
Mult.: 1
53 Position Socket (Female) 23-53 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 7.5 A Gold Copper Alloy 38999 Aluminum