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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Amphenol Aerospace Circular MIL Spec Connector 5P SIZE 15 WALL MOUNT RECEPTACLE SKT
Datasheet
2In Stock
100On Order
Min.: 1
Mult.: 1

5 Position Socket (Female) 15-05 Receptacles 15 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 12P RCPT SZ 15 PIN WL MNT
Datasheet
12In Stock
100Expected 10/23/2026
Min.: 1
Mult.: 1

12 Position Pin (Male) 15-97 Receptacles 15 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 55P RCPT SZ 17 PIN WL MNT
Datasheet
1In Stock
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 55P SIZE 17 WALL MOUNT RECEPTACLE PIN
Datasheet
2In Stock
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 55P WL mnt pin sz 17
Datasheet
9In Stock
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 32P Sz 19 Wall Mount Receptacle Nickel
Datasheet
10In Stock
Min.: 1
Mult.: 1

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 Each
Amphenol Aerospace Circular MIL Spec Connector 66P RCPT SZ 19 SKT WL MNT
Datasheet
1In Stock
100Expected 9/17/2026
Min.: 1
Mult.: 1

66 Position Socket (Female) 19-35 Receptacles 19 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 11P FM SZ 21 PIN WL MNT
Datasheet
1In Stock
Min.: 1
Mult.: 1

11 Position Pin (Male) 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 SKT WL MNT
Datasheet
9In Stock
Min.: 1
Mult.: 1

16 Position Socket (Female) 21-16 Receptacles 21 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 79P st WL mnt sz 21
Datasheet
14In Stock
Min.: 1
Mult.: 1

79 Position Pin (Male) 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 21P RCPT SZ 23 SKT WL MNT
Datasheet
12In Stock
100Expected 10/23/2026
Min.: 1
Mult.: 1

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 55P SIZE 23 WALL MOUNT RECEPTACLE PIN
Datasheet
1In Stock
18Expected 8/21/2026
Min.: 1
Mult.: 1

55 Position Pin (Male) 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 29P WL MNT PIN SZ 25
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 1
Mult.: 1

29 Position Pin (Male) 25-29 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 128P WL MNT PIN SZ 25
Datasheet
2In Stock
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 6P RCPT SZ 9 PIN PNL MNT
Datasheet
11In 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 4P jam nut soc sz 13
Datasheet
2In Stock
Min.: 1
Mult.: 1

4 Position Socket (Female) 13-04 Receptacles 13 Jam Nut MIL-DTL-38999 III Crimp Panel 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 12P RCPT SZ 15 SKT PNL MNT
Datasheet
6In Stock
Min.: 1
Mult.: 1

12 Position Socket (Female) 15-97 Receptacles 15 Jam Nut MIL-DTL-38999 III Crimp Panel 7.5 A, 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 29P jam nut soc sz 25
Datasheet
7In Stock
Min.: 1
Mult.: 1

29 Position Socket (Female) 25-29 Receptacles 25 Jam Nut MIL-DTL-38999 III Crimp Panel 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 22P SZ 13 PLUG CBL MNT PIN
Datasheet
4In Stock
Min.: 1
Mult.: 1

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 PLG SZ 13 SKT CBL MNT
Datasheet
5In Stock
Min.: 1
Mult.: 1

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 SIZE 13 4 PIN
Datasheet
6In Stock
100Expected 10/6/2026
Min.: 1
Mult.: 1

4 Position Pin (Male) 13-04 Plugs 13 Straight MIL-DTL-38999 III Crimp Cable 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 10P; SZ 13 ST PLUG STRT PLUG
Datasheet
4In Stock
100Expected 10/23/2026
Min.: 1
Mult.: 1

10 Position Pin (Male) 13-98 Plugs 13 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 15P PLG SZ 15 PIN CBL MNT
Datasheet
9In Stock
100Expected 11/11/2026
Min.: 1
Mult.: 1

15 Position Pin (Male) 15-15 Plugs 15 Straight MIL-DTL-38999 III Crimp Cable 7.5 A, 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector MS/TRI-START ALUMINUM
Datasheet
13In Stock
100Expected 8/24/2026
Min.: 1
Mult.: 1

18 Position Socket (Female) 15-18 Plugs 15 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum