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 TRI-START ALUMINUM D38999/26FJ35PA Amphenol Aerospace 1: 155,91 € 97In 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	97In Stock	155,91 € 134,61 € 129,78 € 128,81 €	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 128P RCPT SZ 25 PIN WL MNT D38999/20FJ35PA Amphenol Aerospace 1: 185,18 € 115In 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	115In Stock	185,18 € 156,36 € 105,40 €	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 TRI-START ALUMINUM D38999/20WH35SA Amphenol Aerospace 1: 229,77 € 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	229,77 € 190,48 €	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 8P FM SZ 13 PIN PNL MNT D38999/24WC8PN Amphenol Aerospace 1: 60,29 € 351In 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	351In Stock	60,29 € 52,35 € 47,14 € 39,53 €	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 4P FM SZ 13 SKT WL MNT D38999/20WC4SN Amphenol Aerospace 1: 76,54 € 649In Stock	Mfr. Part No. D38999/20WC4SN Mouser Part No 654-D38999/20WC4SN	Amphenol Aerospace	Circular MIL Spec Connector 4P FM SZ 13 SKT WL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	649In Stock	76,54 € 68,81 € 68,76 € 65,49 € 62,40 €	Min.: 1 Mult.: 1	No	4 Position	Socket (Female)	13-04	Receptacles	13	Wall Mount	MIL-DTL-38999 III	Crimp	Wall Mount	13 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 10P SIZE 13 STRAIGHT PLUG PIN D38999/26WC98PN Amphenol Aerospace 1: 51,27 € 969In Stock	Mfr. Part No. D38999/26WC98PN Mouser Part No 654-D38999/26WC98PN	Amphenol Aerospace	Circular MIL Spec Connector 10P SIZE 13 STRAIGHT PLUG PIN Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	969In Stock	51,27 € 42,72 € 37,98 € 37,79 €	Min.: 1 Mult.: 1	No	10 Position	Pin (Male)	13-98	Plugs	13	Straight	MIL-DTL-38999 III	Crimp	Cable	7.5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 79P SIZE 21 STRAIGHT PLUG SKT D38999/26WG35SA Amphenol Aerospace 1: 321,84 € 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	321,84 € 284,64 € 269,61 € 168,77 €	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: 669,63 € 35In Stock 80Expected 11/17/2026	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 11/17/2026	669,63 € 503,67 €	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 55P RCPT SZ 17 PIN PNL MNT D38999/24FE35PN Amphenol Aerospace 1: 85,37 € 341In 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	341In Stock	85,37 € 80,60 €	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 D38999/26FB35SB Amphenol Aerospace 1: 110,45 € 98In Stock	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	98In Stock	110,45 € 102,56 €	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 22P PLG SZ 13 PIN CBL MNT D38999/26FC35PC Amphenol Aerospace 1: 187,59 € 26In Stock	Mfr. Part No. D38999/26FC35PC Mouser Part No 654-D38999/26FC35PC	Amphenol Aerospace	Circular MIL Spec Connector 22P PLG SZ 13 PIN CBL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	26In Stock	187,59 € 113,50 €	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
Circular MIL Spec Connector 5P RCPT SZ 15 SKT PNL MNT D38999/24FD5SN Amphenol Aerospace 1: 131,67 € 95In Stock	Mfr. Part No. D38999/24FD5SN Mouser Part No 654-D38999/24FD5SN	Amphenol Aerospace	Circular MIL Spec Connector 5P RCPT SZ 15 SKT PNL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	95In Stock	131,67 € 72,25 € 66,65 €	Min.: 1 Mult.: 1		5 Position	Socket (Female)	15-05	Receptacles	15	Jam Nut	MIL-DTL-38999 III	Crimp	Panel	13 A	Gold	Copper Alloy	38999 Aluminum	Each
Circular MIL Spec Connector 3P SZ 9 PLUG CBL MNT PIN D38999/26FA98PB Amphenol Aerospace 1: 90,00 € 91In Stock	Mfr. Part No. D38999/26FA98PB Mouser Part No 654-D38999/26FA98PB	Amphenol Aerospace	Circular MIL Spec Connector 3P SZ 9 PLUG CBL MNT PIN Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	91In Stock	90,00 € 81,56 € 78,69 €	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
Circular MIL Spec Connector 100P SIZE 23 STRAIGHT PLUG PIN D38999/26JH35PA Amphenol Aerospace 1: 247,00 € 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	247,00 € 215,75 € 207,23 €	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 37P SIZE 15 JAM NUT RECEPTACLE PIN D38999/24FD35PB Amphenol Aerospace 1: 76,36 € 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	76,36 € 74,67 €	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 11P SZ 21 WALL MOUNT SOCKET D38999/20FG11SA Amphenol Aerospace 1: 95,41 € 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	95,41 €	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: 89,44 € 105In 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	105In Stock	89,44 €	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 66P RCPT SZ 19 PIN PNL MNT D38999/24FF35PN Amphenol Aerospace 1: 103,38 € 50In Stock	Mfr. Part No. D38999/24FF35PN Mouser Part No 654-D38999/24FF35PN	Amphenol Aerospace	Circular MIL Spec Connector 66P RCPT SZ 19 PIN PNL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	50In Stock	103,38 € 88,89 € 88,41 €	Min.: 1 Mult.: 1		66 Position	Pin (Male)	19-35	Receptacles	19	Jam Nut	MIL-DTL-38999 III	Crimp	Panel	5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 66P PLG SZ 19 SKT CBL MNT D38999/26JF35SN Amphenol Aerospace 1: 182,08 € 73In Stock	Mfr. Part No. D38999/26JF35SN Mouser Part No 654-D38999/26JF35SN	Amphenol Aerospace	Circular MIL Spec Connector 66P PLG SZ 19 SKT CBL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	73In Stock	182,08 €	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
Circular MIL Spec Connector 128P FM SZ 25 SCKT WL MNT D38999/20JJ35SA Amphenol Aerospace 1: 244,02 € 58In Stock	Mfr. Part No. D38999/20JJ35SA Mouser Part No 654-D38999/20JJ35SA	Amphenol Aerospace	Circular MIL Spec Connector 128P FM SZ 25 SCKT WL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	58In Stock	244,02 €	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
Circular MIL Spec Connector 22P RCPT SZ 13 PIN WL MNT D38999/20WC35PB Amphenol Aerospace 1: 68,81 € 125In Stock	Mfr. Part No. D38999/20WC35PB Mouser Part No 654-D38999/20WC35PB	Amphenol Aerospace	Circular MIL Spec Connector 22P RCPT SZ 13 PIN WL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	125In Stock	68,81 € 58,03 € 47,41 €	Min.: 1 Mult.: 1	No	22 Position	Pin (Male)	13-35	Receptacles	13	Wall Mount	MIL-DTL-38999 III	Crimp	Wall Mount	5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 37P FM SZ 15 SKT WL MNT D38999/20WD35SB Amphenol Aerospace 1: 167,86 € 98In Stock	Mfr. Part No. D38999/20WD35SB Mouser Part No 654-D38999/20WD35SB	Amphenol Aerospace	Circular MIL Spec Connector 37P FM SZ 15 SKT WL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	98In Stock	167,86 € 121,46 €	Min.: 1 Mult.: 1	No	37 Position	Socket (Female)	15-35	Receptacles	15	Wall Mount	MIL-DTL-38999 III	Crimp	Wall Mount	5 A	Gold	Copper Alloy	38999 Aluminum	Bulk
Circular MIL Spec Connector MS/TRI-START ALUMINUM D38999/26FD35PC Amphenol Aerospace 1: 224,80 € 88In Stock	Mfr. Part No. D38999/26FD35PC Mouser Part No 654-D38999/26FD35PC	Amphenol Aerospace	Circular MIL Spec Connector MS/TRI-START ALUMINUM Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	88In Stock	224,80 € 188,65 € 126,51 € 121,59 € View Quote	Min.: 1 Mult.: 1		37 Position	Pin (Male)	15-35	Plugs	15	Straight	MIL-DTL-38999 III	Crimp	Cable	5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 39P FM SZ 21 PIN WL MNT D38999/20FG39PN Amphenol Aerospace 1: 92,25 € 93In Stock	Mfr. Part No. D38999/20FG39PN Mouser Part No 654-D38999/20FG39PN	Amphenol Aerospace	Circular MIL Spec Connector 39P FM SZ 21 PIN WL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	93In Stock	92,25 € 83,07 € 83,06 €	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
Circular MIL Spec Connector 10P ST WL MNT sz 13 D38999/20WC98PA Amphenol Aerospace 1: 74,19 € 61In Stock	Mfr. Part No. D38999/20WC98PA Mouser Part No 654-D38999/20WC98PA	Amphenol Aerospace	Circular MIL Spec Connector 10P ST WL MNT sz 13 Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	61In Stock	74,19 € 67,05 € 61,48 € 50,87 €	Min.: 1 Mult.: 1	No	10 Position	Pin (Male)	13-98	Receptacles	13	Wall Mount	MIL-DTL-38999 III	Crimp	Wall Mount	7.5 A	Gold	Copper Alloy	38999 Aluminum