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
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Amphenol Aerospace Circular MIL Spec Connector 128P RCPT SZ 25 SKT WL MNT
Datasheet
35In Stock
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 Each
Amphenol Aerospace Circular MIL Spec Connector 128P SIZE 25 JAM NUT RECEPTACLE SKT
Datasheet
43In Stock
Min.: 1
Mult.: 1

128 Position Socket (Female) 25-35 Receptacles 25 Jam Nut MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 2P ST PLUG PIN SZ 11
Datasheet
104In Stock
Min.: 1
Mult.: 1

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 39P FM SZ 21 PIN WL MNT
Datasheet
96In Stock
Min.: 1
Mult.: 1
39 Position Pin (Male) 21-39 Receptacles 21 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 7.5 A, 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 41P FM SZ 21 PIN PNL MNT
Datasheet
91In Stock
Min.: 1
Mult.: 1
41 Position Pin (Male) 21-41 Receptacles 21 Jam Nut MIL-DTL-38999 III Crimp Panel 7.5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector SZ 23;100 PIN CRIMP WL MNT RECPT
Datasheet
105In 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 79P FM SZ 21 PIN PNL MNT
Datasheet
101In Stock
Min.: 1
Mult.: 1
No
79 Position Pin (Male) 21-35 Receptacles 21 Jam Nut MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 21P RCPT SZ 23 SKT PNL MNT
Datasheet
55In Stock
Min.: 1
Mult.: 1
No
21 Position Socket (Female) 23-21 Receptacles 23 Jam Nut MIL-DTL-38999 III Crimp Panel 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 100P SZ 23WALL MOUNT SOCKET
Datasheet
13In Stock
Min.: 1
Mult.: 1

100 Position Without Socket Contacts 23-35 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 79P jam nut soc sz 21
Datasheet
10In Stock
Min.: 1
Mult.: 1

79 Position Without Socket Contacts 21-35 Receptacles 21 Jam Nut MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 100P SIZE 23 STRAIGHT PLUG PIN
Datasheet
64In 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 Composite 38999
Amphenol Aerospace Circular MIL Spec Connector 55P PLG SZ 23 PIN CBL MNT
Datasheet
99In Stock
Min.: 1
Mult.: 1

55 Position Pin (Male) 23-55 Plugs 23 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 66P PLG SZ 19 SKT CBL MNT
Datasheet
75In 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 Composite 38999
Amphenol Aerospace Circular MIL Spec Connector 128P FM SZ 25 SCKT WL MNT
Datasheet
61In Stock
Min.: 1
Mult.: 1
No
128 Position Socket (Female) 25-35 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy Composite 38999
Amphenol Aerospace Circular MIL Spec Connector 37P RCPT SZ 15 PIN WL MNT
Datasheet
13In Stock
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
Amphenol Aerospace Circular MIL Spec Connector 3P SZ 9 PLUG CBL MNT PIN
Datasheet
98In Stock
Min.: 1
Mult.: 1

3 Position Pin (Male) 09-98 Plugs 9 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 128P FM SZ 25 SKT WL MNT
Datasheet
60In Stock
Min.: 1
Mult.: 1
No
128 Position Socket (Female) 25-35 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Wall Mount 5 A Gold Copper Alloy Composite 38999
Amphenol Aerospace Circular MIL Spec Connector 37P SIZE 15 JAM NUT RECEPTACLE PIN
Datasheet
23In Stock
Min.: 1
Mult.: 1

37 Position Pin (Male) 15-35 Receptacles 15 Jam Nut MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 18P SZ 15 RCPT PNL MNT SKT
Datasheet
7In Stock
Min.: 1
Mult.: 1
No
18 Position Socket (Female) 15-18 Receptacles 15 Jam Nut MIL-DTL-38999 III Crimp Panel 7.5 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector TRI-START ALUMINUM
Datasheet
25In Stock
75Expected 10/08/2026
Min.: 1
Mult.: 1
No
23 Position Socket (Female) 17-99 Receptacles 17 Jam Nut MIL-DTL-38999 III Crimp Panel 7.5 A, 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 16P RCPT SZ 21 SKT PNL MNT
Datasheet
7In Stock
Min.: 1
Mult.: 1
No
16 Position Socket (Female) 21-16 Receptacles 21 Jam Nut MIL-DTL-38999 III Crimp Panel 13 A Gold Copper Alloy 38999 Aluminum Each
Amphenol Aerospace Circular MIL Spec Connector 6P ST PLUG PIN SZ 11
Datasheet
95In Stock
Min.: 1
Mult.: 1
No
6 Position Pin (Male) 11-98 Plugs 11 Straight MIL-DTL-38999 III Crimp Cable 7.5 A Gold Copper Alloy 38999 Aluminum Bulk
Amphenol Aerospace Circular MIL Spec Connector 12P FM SZ 15 SKT WL MNT
Datasheet
94In Stock
Min.: 1
Mult.: 1
No
12 Position Socket (Female) 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 3P FM SZ 9 SKT PNL MNT
Datasheet
103In Stock
Min.: 1
Mult.: 1
No
3 Position Socket (Female) 09-98 Receptacles 9 Jam Nut MIL-DTL-38999 III Crimp Panel 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 32P JAM NUT PIN SZ 19
Datasheet
98In Stock
Min.: 1
Mult.: 1
No
32 Position Pin (Male) 19-32 Receptacles 19 Jam Nut MIL-DTL-38999 III Crimp Panel 7.5 A Gold Copper Alloy 38999 Aluminum