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 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 Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 4P RCPT SZ 21 SKT WL MNT
Datasheet
1In Stock
Min.: 1
Mult.: 1
No
4 Position Socket (Female) 21-75 Receptacles 21 Wall Mount MIL-DTL-38999 III Crimp Panel 46 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 21P FM SZ 23 PIN WL MNT
Datasheet
4In Stock
Min.: 1
Mult.: 1
No
21 Position Pin (Male) 23-21 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Panel 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector TRI-START ALUMINUM
Datasheet
1In Stock
Min.: 1
Mult.: 1
No
100 Position Socket (Female) 23-35 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 100P RCPT SZ 23 SKT WL MNT
Datasheet
1In Stock
Min.: 1
Mult.: 1
No
100 Position Socket (Female) 23-35 Receptacles 23 Wall Mount MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 24P FM SZ 25 PIN WL MNT
Datasheet
1In Stock
Min.: 1
Mult.: 1
No
24 Position Pin (Male) 25-24 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Panel 13 A, 23 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 24P RCPT SZ 25 SKT WL MNT
Datasheet
1In Stock
Min.: 1
Mult.: 1
No
24 Position Socket (Female) 25-24 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Panel 13 A, 23 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector TRI-START ALUMINUM
Datasheet
3In Stock
Min.: 1
Mult.: 1
No
128 Position Pin (Male) 25-35 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 128P FM SZ 25 SKT WL MNT
Datasheet
1In Stock
Min.: 1
Mult.: 1
No
128 Position Socket (Female) 25-35 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 56P RCPT SZ 25 PIN WL MNT
Datasheet
2In Stock
Min.: 1
Mult.: 1
No
56 Position Pin (Male) 25-04 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Panel 7.5 A, 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 61P FM SZ 25 PIN WL MNT
Datasheet
4In Stock
Min.: 1
Mult.: 1
No
61 Position Pin (Male) 25-61 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Panel 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 8P SZ 25 RCPT WALL MNT PIN
Datasheet
1In Stock
Min.: 1
Mult.: 1
No
8 Position Without Pin Contacts 25-08 Receptacles 25 Wall Mount MIL-DTL-38999 III Crimp Panel 46 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 5P JAM NUT SOC SZ 11
Datasheet
2In Stock
Min.: 1
Mult.: 1

5 Position Socket (Female) 11-05 Receptacles 11 Jam Nut MIL-DTL-38999 III Crimp Panel 7.5 A Gold Copper Alloy 38999 Aluminum Bulk
Amphenol Aerospace Circular MIL Spec Connector 4P jam nut soc sz 13
Datasheet
1In 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 10P FM SZ 13 SKT PNL MNT
Datasheet
3In Stock
Min.: 1
Mult.: 1
10 Position Socket (Female) 13-98 Receptacles 13 Jam Nut MIL-DTL-38999 III Crimp Panel 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector TRI-START ALUMINUM
Datasheet
1In Stock
27Expected 20/04/2026
Min.: 1
Mult.: 1
10 Position Socket (Female) 13-98 Receptacles 13 Jam Nut MIL-DTL-38999 III Crimp Panel 7.5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 37P SIZE 15 JAM NUT RECEPTACLE PIN
Datasheet
3In 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 6P jam nut pin sz 17
Datasheet
2In Stock
21Expected 23/02/2026
Min.: 1
Mult.: 1

6 Position Pin (Male) 17-06 Receptacles 17 Jam Nut MIL-DTL-38999 III Crimp Panel 23 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 8P RCPT SZ 17 PIN PNL MNT
Datasheet
2In Stock
Min.: 1
Mult.: 1

8 Position Pin (Male) 17-08 Receptacles 17 Jam Nut MIL-DTL-38999 III Crimp Panel 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 11P SZ 19 PANEL MOUNT PIN
Datasheet
4In 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 39P FM SZ 21 PIN PNL MNT
Datasheet
1In Stock
Min.: 1
Mult.: 1

39 Position Pin (Male) 21-39 Receptacles 21 Jam Nut MIL-DTL-38999 III Crimp Panel 7.5 A, 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 21P RCPT SZ 23 SKT PNL MNT
Datasheet
1In Stock
Min.: 1
Mult.: 1

21 Position Socket (Female) 23-21 Receptacles 23 Jam Nut MIL-DTL-38999 III Crimp Panel 13 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 100P jam nut soc sz 23
Datasheet
1In Stock
Min.: 1
Mult.: 1
100 Position Socket (Female) 23-35 Receptacles 23 Jam Nut MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum
Amphenol Aerospace Circular MIL Spec Connector 43P jam nut soc sz 25
Datasheet
1In Stock
Min.: 1
Mult.: 1

43 Position Socket (Female) 25-43 Receptacles 25 Jam Nut MIL-DTL-38999 III Crimp Panel 7.5 A, 13 A Gold Copper Alloy 38999 Aluminum Bulk
Amphenol Aerospace Circular MIL Spec Connector 13P SZ 11 RCPT PNL MNT SKT
Datasheet
2In Stock
Min.: 1
Mult.: 1
No
13 Position Socket (Female) 11-35 Receptacles 11 Jam Nut MIL-DTL-38999 III Crimp Panel 5 A Gold Copper Alloy 38999 Aluminum