Circular MIL Spec Connector

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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 1000V_RMS. These rugged and highly reliable circular connectors are ideally suited for industrial, commercial air, military, C4ISR, and space applications.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (EUR) Filter the results in the table by unit price based on your quantity.	Qty.	RoHS	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
Circular MIL Spec Connector 128P RCPT SZ 25 PIN WL MNT D38999/20FJ35PA Amphenol Aerospace 1: 179,08 € 117In Stock	Mfr. Part No. D38999/20FJ35PA Mouser Part No 654-D38999/20FJ35PA	Amphenol Aerospace	Circular MIL Spec Connector 128P RCPT SZ 25 PIN WL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	117In Stock	179,08 € 150,90 € 102,09 €	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
Circular MIL Spec Connector 79P SIZE 21 STRAIGHT PLUG SKT D38999/26WG35SA Amphenol Aerospace 1: 306,77 € 101In Stock	Mfr. Part No. D38999/26WG35SA Mouser Part No 654-D38999/26WG35SA	Amphenol Aerospace	Circular MIL Spec Connector 79P SIZE 21 STRAIGHT PLUG SKT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	101In Stock	306,77 € 275,64 € 261,06 € 161,26 €	Min.: 1 Mult.: 1	No	79 Position	Socket (Female)	21-35	Plugs	21	Straight	MIL-DTL-38999 III	Crimp	Cable	5 A	Gold	Copper Alloy	38999 Aluminum	Each
Circular MIL Spec Connector 4P PLG SZ 21 PIN CBL MNT D38999/26WG75PN Amphenol Aerospace 1: 648,16 € 35In Stock 80Expected 17/11/2026	Mfr. Part No. D38999/26WG75PN Mouser Part No 654-D38999/26WG75PN	Amphenol Aerospace	Circular MIL Spec Connector 4P PLG SZ 21 PIN CBL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	35In Stock 80Expected 17/11/2026	648,16 € 487,80 €	Min.: 1 Mult.: 1	No	4 Position	Pin (Male)	21-75	Plugs	21	Straight	MIL-DTL-38999 III	Crimp	Cable	46 A	Gold	Copper Alloy	38999 Aluminum	Each
Circular MIL Spec Connector 8P FM SZ 13 PIN PNL MNT D38999/24WC8PN Amphenol Aerospace 1: 58,39 € 355In Stock	Mfr. Part No. D38999/24WC8PN Mouser Part No 654-D38999/24WC8PN	Amphenol Aerospace	Circular MIL Spec Connector 8P FM SZ 13 PIN PNL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	355In Stock	58,39 € 50,70 € 45,65 € 38,30 €	Min.: 1 Mult.: 1	No	8 Position	Pin (Male)	13-08	Receptacles	13	Jam Nut	MIL-DTL-38999 III	Crimp	Panel	7.5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 55P RCPT SZ 17 PIN PNL MNT D38999/24FE35PN Amphenol Aerospace 1: 82,51 € 342In Stock	Mfr. Part No. D38999/24FE35PN Mouser Part No 654-D38999/24FE35PN	Amphenol Aerospace	Circular MIL Spec Connector 55P RCPT SZ 17 PIN PNL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	342In Stock	82,51 € 78,07 €	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
Circular MIL Spec Connector TRI-START ALUMINUM D38999/20WH35SA Amphenol Aerospace 1: 168,16 € 96In Stock	Mfr. Part No. D38999/20WH35SA Mouser Part No 654-D38999/20WH35SA	Amphenol Aerospace	Circular MIL Spec Connector TRI-START ALUMINUM Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	96In Stock	168,16 €	Min.: 1 Mult.: 1	No	100 Position	Socket (Female)	23-35	Receptacles	23	Wall Mount	MIL-DTL-38999 III	Crimp	Wall Mount	5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 37P SIZE 15 JAM NUT RECEPTACLE PIN D38999/24FD35PB Amphenol Aerospace 1: 73,94 € 21In Stock	Mfr. Part No. D38999/24FD35PB Mouser Part No 654-D38999/24FD35PB	Amphenol Aerospace	Circular MIL Spec Connector 37P SIZE 15 JAM NUT RECEPTACLE PIN Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	21In Stock	73,94 € 72,32 €	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
Circular MIL Spec Connector TRI-START ALUMINUM D38999/26FJ35PA Amphenol Aerospace 1: 150,99 € 98In Stock	Mfr. Part No. D38999/26FJ35PA Mouser Part No 654-D38999/26FJ35PA	Amphenol Aerospace	Circular MIL Spec Connector TRI-START ALUMINUM Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	98In Stock	150,99 € 130,37 € 125,69 € 124,75 €	Min.: 1 Mult.: 1		128 Position	Pin (Male)	25-35	Plugs	25	Straight	MIL-DTL-38999 III	Crimp	Cable	5 A	Gold	Copper Alloy	38999 Aluminum	Bulk
Circular MIL Spec Connector 11P SZ 21 WALL MOUNT SOCKET D38999/20FG11SA Amphenol Aerospace 1: 92,69 € 88In Stock	Mfr. Part No. D38999/20FG11SA Mouser Part No 654-D38999/20FG11SA	Amphenol Aerospace	Circular MIL Spec Connector 11P SZ 21 WALL MOUNT SOCKET Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	88In Stock	92,69 € 92,40 €	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
Circular MIL Spec Connector 19P RCPT SZ 25 PIN WL MNT D38999/20FJ19PN Amphenol Aerospace 1: 86,62 € 108In Stock	Mfr. Part No. D38999/20FJ19PN Mouser Part No 654-D38999/20FJ19PN	Amphenol Aerospace	Circular MIL Spec Connector 19P RCPT SZ 25 PIN WL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	108In Stock	86,62 €	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
Circular MIL Spec Connector TRI-START ALUMINUM D38999/26FB35SB Amphenol Aerospace 1: 106,61 € 95In Stock 3Expected 19/11/2026	Mfr. Part No. D38999/26FB35SB Mouser Part No 654-D38999/26FB35SB	Amphenol Aerospace	Circular MIL Spec Connector TRI-START ALUMINUM Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	95In Stock 3Expected 19/11/2026	106,61 € 99,32 €	Min.: 1 Mult.: 1		13 Position	Socket (Female)	11-35	Plugs	11	Straight	MIL-DTL-38999 III	Crimp	Cable	5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 100P SIZE 23 STRAIGHT PLUG PIN D38999/26JH35PA Amphenol Aerospace 1: 239,21 € 59In Stock	Mfr. Part No. D38999/26JH35PA Mouser Part No 654-D38999/26JH35PA	Amphenol Aerospace	Circular MIL Spec Connector 100P SIZE 23 STRAIGHT PLUG PIN Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	59In Stock	239,21 € 209,16 € 200,71 €	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
Circular MIL Spec Connector 55P RCPT SZ 17 SKT WL MNT D38999/20WE35SC Amphenol Aerospace 1: 152,24 € 24In Stock	Mfr. Part No. D38999/20WE35SC Mouser Part No 654-D38999/20WE35SC	Amphenol Aerospace	Circular MIL Spec Connector 55P RCPT SZ 17 SKT WL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	24In Stock	152,24 € 112,76 € 107,30 € View Quote	Min.: 1 Mult.: 1	No	55 Position	Socket (Female)	17-35	Receptacles	17	Wall Mount	MIL-DTL-38999 III	Crimp	Wall Mount	5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 6P PLG SZ 9 SKT CBL MNT D38999/26WA35SD Amphenol Aerospace 1: 70,00 € 76In Stock 15On Order	Mfr. Part No. D38999/26WA35SD Mouser Part No 654-D38999/26WA35SD	Amphenol Aerospace	Circular MIL Spec Connector 6P PLG SZ 9 SKT CBL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	76In Stock 15On Order	70,00 € 62,22 € 59,83 € 57,84 € 54,62 €	Min.: 1 Mult.: 1	No	6 Position	Socket (Female)	09-35	Plugs	9	Straight	MIL-DTL-38999 III	Crimp	Cable	5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector TRI-START ALUMINUM D38999/26WB98SB Amphenol Aerospace 1: 85,60 € 87In Stock	Mfr. Part No. D38999/26WB98SB Mouser Part No 654-D38999/26WB98SB	Amphenol Aerospace	Circular MIL Spec Connector TRI-START ALUMINUM Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	87In Stock	85,60 € 81,23 € 78,11 € 75,50 € 68,55 €	Min.: 1 Mult.: 1	No	6 Position	Socket (Female)	11-98	Plugs	11	Straight	MIL-DTL-38999 III	Crimp	Cable	7.5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 53P SIZE 23 STRAIGHT PLUG SKT D38999/26WH53SN Amphenol Aerospace 1: 244,39 € 98In Stock	Mfr. Part No. D38999/26WH53SN Mouser Part No 654-D38999/26WH53SN	Amphenol Aerospace	Circular MIL Spec Connector 53P SIZE 23 STRAIGHT PLUG SKT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	98In Stock	244,39 € 140,43 € 140,40 € 133,02 € View Quote	Min.: 1 Mult.: 1		53 Position	Socket (Female)	23-53	Plugs	23	Straight	MIL-DTL-38999 III	Crimp	Cable	7.5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 23P RCPT SZ 17 SCKT WL MNT D38999/20WE99SN Amphenol Aerospace 1: 116,76 € 45In Stock	Mfr. Part No. D38999/20WE99SN Mouser Part No 654-D38999/20WE99SN	Amphenol Aerospace	Circular MIL Spec Connector 23P RCPT SZ 17 SCKT WL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	45In Stock	116,76 € 115,33 € 91,46 € 90,29 € View Quote	Min.: 1 Mult.: 1	No	23 Position	Socket (Female)	17-99	Receptacles	17	Wall Mount	MIL-DTL-38999 III	Crimp	Wall Mount	7.5 A, 13 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 41P FM SZ 21 PIN PNL MNT D38999/24FG41PN Amphenol Aerospace 1: 177,78 € 88In Stock	Mfr. Part No. D38999/24FG41PN Mouser Part No 654-D38999/24FG41PN	Amphenol Aerospace	Circular MIL Spec Connector 41P FM SZ 21 PIN PNL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	88In Stock	177,78 € 155,81 € 87,12 €	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
Circular MIL Spec Connector 55P SIZE 17 JAM NUT RECEPTACLE PIN D38999/24WE35PA Amphenol Aerospace 1: 85,81 € 96In Stock	Mfr. Part No. D38999/24WE35PA Mouser Part No 654-D38999/24WE35PA	Amphenol Aerospace	Circular MIL Spec Connector 55P SIZE 17 JAM NUT RECEPTACLE PIN Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	96In Stock	85,81 € 81,37 €	Min.: 1 Mult.: 1	No	55 Position	Pin (Male)	17-35	Receptacles	17	Jam Nut	MIL-DTL-38999 III	Crimp	Panel	5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 32P JAM NUT PIN SZ 19 D38999/24WF32PA Amphenol Aerospace 1: 83,75 € 91In Stock	Mfr. Part No. D38999/24WF32PA Mouser Part No 654-D38999/24WF32PA	Amphenol Aerospace	Circular MIL Spec Connector 32P JAM NUT PIN SZ 19 Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	91In Stock	83,75 € 78,14 €	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
Circular MIL Spec Connector 55P SIZE 17 STRAIGHT PLUG PIN D38999/26WE35PC Amphenol Aerospace 1: 90,39 € 30In Stock	Mfr. Part No. D38999/26WE35PC Mouser Part No 654-D38999/26WE35PC	Amphenol Aerospace	Circular MIL Spec Connector 55P SIZE 17 STRAIGHT PLUG PIN Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	30In Stock	90,39 € 81,39 € 73,26 € 64,96 €	Min.: 1 Mult.: 1	No	55 Position	Pin (Male)	17-35	Plugs	17	Straight	MIL-DTL-38999 III	Crimp	Cable	5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 12P SZ 15 PANEL MOUNT PIN D38999/24WD97PA Amphenol Aerospace 1: 117,57 € 17In Stock	Mfr. Part No. D38999/24WD97PA Mouser Part No 654-D38999/24WD97PA	Amphenol Aerospace	Circular MIL Spec Connector 12P SZ 15 PANEL MOUNT PIN Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	17In Stock	117,57 € 82,56 € 82,55 €	Min.: 1 Mult.: 1	No	12 Position	Pin (Male)	15-97	Receptacles	15	Jam Nut	MIL-DTL-38999 III	Crimp	Panel	7.5 A, 13 A	Gold	Copper Alloy	38999 Aluminum	Each
Circular MIL Spec Connector 11P FM SZ 21 PIN PNL MNT D38999/24WG11PA Amphenol Aerospace 1: 105,32 € 88In Stock	Mfr. Part No. D38999/24WG11PA Mouser Part No 654-D38999/24WG11PA	Amphenol Aerospace	Circular MIL Spec Connector 11P FM SZ 21 PIN PNL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	88In Stock	105,32 € 95,55 € 93,36 € 93,11 € Quote Quote	Min.: 1 Mult.: 1	No	11 Position	Pin (Male)	21-11	Receptacles	21	Jam Nut	MIL-DTL-38999 III	Crimp	Panel	23 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 4P JAM NUT RECPT SZ 21 D38999/24WG75AN Amphenol Aerospace 1: 241,93 € 37In Stock	Mfr. Part No. D38999/24WG75AN Mouser Part No 654-D38999/24WG75AN	Amphenol Aerospace	Circular MIL Spec Connector 4P JAM NUT RECPT SZ 21 Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	37In Stock	241,93 € 190,23 €	Min.: 1 Mult.: 1	No	4 Position	Without Pin Contacts	21-75	Receptacles	21	Jam Nut	MIL-DTL-38999 III	Crimp	Panel	46 A	Gold	Copper Alloy	38999 Aluminum	Each
Circular MIL Spec Connector 4P ST PLUG SZ 13 D38999/26WC4SA Amphenol Aerospace 1: 75,59 € 94In Stock	Mfr. Part No. D38999/26WC4SA Mouser Part No 654-D38999/26WC4SA	Amphenol Aerospace	Circular MIL Spec Connector 4P ST PLUG SZ 13 Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	94In Stock	75,59 € 74,07 €	Min.: 1 Mult.: 1		4 Position	Socket (Female)	13-04	Plugs	13	Straight	MIL-DTL-38999 III	Crimp	Cable	13 A	Gold	Copper Alloy	38999 Aluminum