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.
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Amphenol Aerospace Circular MIL Spec Connector 79P ST PLUG PIN SZ 21
Datasheet
198In Stock
104Expected 10/19/2026
Min.: 1
Mult.: 1
No
79 Position Pin (Male) 21-35 Plugs 21 Straight MIL-DTL-38999 III Crimp Cable 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector PLUG CRIMP TERM
Datasheet
149In Stock
255On Order
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 19P PLG SZ 25 SKT CBL MNT
Datasheet
84In 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 SZ 23;100 PIN CRIMP WL MNT RECPT
Datasheet
98In Stock
Min.: 1
Mult.: 1
100 Position Socket (Female) 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 size 9 6 pin wall mnt recpt
Datasheet
117In Stock
296On Order
Min.: 1
Mult.: 1

6 Position Socket (Female) 09-35 Receptacles 9 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 18P FM SZ 15 SKT WL MNT
Datasheet
87In Stock
Min.: 1
Mult.: 1

18 Position Socket (Female) 15-18 Receptacles 15 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
150In Stock
Min.: 1
Mult.: 1

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 ALUMINUM
Datasheet
54In Stock
100Expected 10/23/2026
Min.: 1
Mult.: 1

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 TRI-START ALUMINUM
Datasheet
63In Stock
100Expected 8/20/2026
Min.: 1
Mult.: 1

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 FM SZ 17 PIN WL MNT
Datasheet
67In Stock
Min.: 1
Mult.: 1

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 RCPT SZ 17 SKT WL MNT
Datasheet
109In Stock
Min.: 1
Mult.: 1

8 Position Socket (Female) 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 11P WL MNT SOC SZ 21
Datasheet
27In Stock
129On Order
Min.: 1
Mult.: 1

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 FM SZ 21 PIN WL MNT
Datasheet
31In Stock
Min.: 1
Mult.: 1

16 Position Pin (Male) 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 21P FM SZ 23 PIN WL MNT
Datasheet
35In Stock
Min.: 1
Mult.: 1

21 Position Pin (Male) 23-21 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 55P SZ 23 WALL MNT SOCKET
Datasheet
94In Stock
Min.: 1
Mult.: 1

55 Position Socket (Female) 23-55 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 7.5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 19P RCPT SZ 25 PIN WL MNT
Datasheet
20In Stock
100Expected 10/23/2026
Min.: 1
Mult.: 1

19 Position Pin (Male) 25-19 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 23 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 128P RCPT SZ 25 PIN WL MNT
Datasheet
23In Stock
100Expected 10/23/2026
Min.: 1
Mult.: 1

128 Position Pin (Male) 25-35 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector TRI-START ALUMINUM
Datasheet
8In Stock
25Expected 10/5/2026
Min.: 1
Mult.: 1

128 Position Socket (Female) 25-35 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 6P RCPT SZ 9 PIN PNL MNT
Datasheet
26In Stock
Min.: 1
Mult.: 1

6 Position Pin (Male) 09-35 Receptacles 9 Jam Nut MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 6P FM SZ 9 SKT PNL MNT
Datasheet
17In Stock
100Expected 9/29/2026
Min.: 1
Mult.: 1

6 Position Socket (Female) 09-35 Receptacles 9 Jam Nut MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 2P SZ 11 PANEL MNT PIN
Datasheet
16In Stock
100Expected 11/12/2026
Min.: 1
Mult.: 1

2 Position Pin (Male) 11-02 Receptacles 11 Jam Nut MIL-DTL-38999 III Crimp Panel 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 13P SZ 11 RCPT PNL MNT PIN
Datasheet
45In Stock
27Expected 11/9/2026
Min.: 1
Mult.: 1

13 Position Pin (Male) 11-35 Receptacles 11 Jam Nut MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 55P RCPT SZ 17 PIN PNL MNT
Datasheet
60In Stock
Min.: 1
Mult.: 1

55 Position Pin (Male) 17-35 Receptacles 17 Jam Nut MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 11P SZ 19 PANEL MOUNT PIN
Datasheet
23In Stock
Min.: 1
Mult.: 1

11 Position Pin (Male) 19-11 Receptacles 19 Jam Nut MIL-DTL-38999 III Crimp Panel 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 11P SIZE 19 SOCKET PANEL MOUNT RECPT
Datasheet
61In Stock
Min.: 1
Mult.: 1

11 Position Socket (Female) 19-11 Receptacles 19 Jam Nut MIL-DTL-38999 III Crimp Panel 13 A Gold Copper Alloy 38999 Aluminum