Circular MIL Spec Connector – Mouser Guatemala

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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 (USD) 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: $175.57 98In Stock	Mfr. Part # D38999/26FJ35PA Mouser Part # 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	$175.57 $151.59 $146.15 $145.06	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: $207.84 117In Stock	Mfr. Part # D38999/20FJ35PA Mouser Part # 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	$207.84 $174.26 $110.34 $109.58	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: $201.86 98In Stock	Mfr. Part # D38999/20WH35SA Mouser Part # 654-D38999/20WH35SA	Amphenol Aerospace	Circular MIL Spec Connector TRI-START ALUMINUM Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	98In Stock	$201.86 $174.29 $169.35	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 79P RCPT SZ 21 PIN PNL MNT D38999/24FG35PN Amphenol Aerospace 1: $129.65 122In Stock	Mfr. Part # D38999/24FG35PN Mouser Part # 654-D38999/24FG35PN	Amphenol Aerospace	Circular MIL Spec Connector 79P RCPT SZ 21 PIN PNL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	122In Stock	$129.65 $116.11 $111.32	Min.: 1 Mult.: 1		79 Position	Pin (Male)	21-35	Receptacles	21	Jam Nut	MIL-DTL-38999 III	Crimp	Panel	5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 55P SIZE 23 JAM NUT RECEPTACLE PIN D38999/24WH55PN Amphenol Aerospace 1: $178.22 97In Stock	Mfr. Part # D38999/24WH55PN Mouser Part # 654-D38999/24WH55PN	Amphenol Aerospace	Circular MIL Spec Connector 55P SIZE 23 JAM NUT RECEPTACLE PIN Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	97In Stock	$178.22	Min.: 1 Mult.: 1	No	55 Position	Pin (Male)	23-55	Receptacles	23	Jam Nut	MIL-DTL-38999 III	Crimp	Panel	7.5 A	Gold	Copper Alloy	38999 Aluminum	Each
Circular MIL Spec Connector 8P FM SZ 13 PIN PNL MNT D38999/24WC8PN Amphenol Aerospace 1: $73.20 358In Stock	Mfr. Part # D38999/24WC8PN Mouser Part # 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	358In Stock	$73.20 $64.66 $59.52 $56.12 Quote Quote	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 79P SIZE 21 STRAIGHT PLUG SKT D38999/26WG35SA Amphenol Aerospace 1: $346.92 101In Stock	Mfr. Part # D38999/26WG35SA Mouser Part # 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	$346.92 $320.50 $303.56 $183.09	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: $753.00 35In Stock 80On Order	Mfr. Part # D38999/26WG75PN Mouser Part # 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 80On Order	$753.00 $523.60	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: $95.67 342In Stock	Mfr. Part # D38999/24FE35PN Mouser Part # 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	$95.67 $88.06 $83.79	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 55P SIZE 23 WALL MOUNT RECEPTACLE PIN D38999/20FH55PN Amphenol Aerospace 1: $169.41 18In Stock	Mfr. Part # D38999/20FH55PN Mouser Part # 654-D38999/20FH55PN	Amphenol Aerospace	Circular MIL Spec Connector 55P SIZE 23 WALL MOUNT RECEPTACLE PIN Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	18In Stock	$169.41 $161.75 $161.71	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
Circular MIL Spec Connector 5P RCPT SZ 15 SKT PNL MNT D38999/24FD5SN Amphenol Aerospace 1: $153.63 96In Stock	Mfr. Part # D38999/24FD5SN Mouser Part # 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	96In Stock	$153.63 $72.17 $70.71 Quote Quote	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 53P RCPT SZ 23 SKT WL MNT D38999/20FH53SN Amphenol Aerospace 1: $183.08 34In Stock	Mfr. Part # D38999/20FH53SN Mouser Part # 654-D38999/20FH53SN	Amphenol Aerospace	Circular MIL Spec Connector 53P RCPT SZ 23 SKT WL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	34In Stock	$183.08 $151.08 $99.41	Min.: 1 Mult.: 1		53 Position	Socket (Female)	23-53	Receptacles	23	Wall Mount	MIL-DTL-38999 III	Crimp	Wall Mount	7.5 A	Gold	Copper Alloy	38999 Aluminum	Each
Circular MIL Spec Connector 3P SZ 9 PLUG CBL MNT PIN D38999/26FA98PB Amphenol Aerospace 1: $101.03 91In Stock	Mfr. Part # D38999/26FA98PB Mouser Part # 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	$101.03 $91.72 $88.51	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 55P SIZE 23 STRAIGHT PLUG SKT D38999/26FH55SN Amphenol Aerospace 1: $330.83 78In Stock	Mfr. Part # D38999/26FH55SN Mouser Part # 654-D38999/26FH55SN	Amphenol Aerospace	Circular MIL Spec Connector 55P SIZE 23 STRAIGHT PLUG SKT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	78In Stock	$330.83 $158.63	Min.: 1 Mult.: 1		55 Position	Socket (Female)	23-55	Plugs	23	Straight	MIL-DTL-38999 III	Crimp	Cable	7.5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 11P SZ 21 WALL MOUNT SOCKET D38999/20FG11SA Amphenol Aerospace 1: $101.66 89In Stock	Mfr. Part # D38999/20FG11SA Mouser Part # 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	89In Stock	$101.66	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: $100.15 109In Stock	Mfr. Part # D38999/20FJ19PN Mouser Part # 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	109In Stock	$100.15 $92.98	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: $123.73 96In Stock 3Expected 11/9/2026	Mfr. Part # D38999/26FB35SB Mouser Part # 654-D38999/26FB35SB	Amphenol Aerospace	Circular MIL Spec Connector TRI-START ALUMINUM Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	96In Stock 3Expected 11/9/2026	$123.73 $115.49	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 37P SIZE 15 JAM NUT RECEPTACLE PIN D38999/24FD35PB Amphenol Aerospace 1: $87.12 21In Stock	Mfr. Part # D38999/24FD35PB Mouser Part # 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	$87.12 $78.04 $77.64	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 100P SIZE 23 STRAIGHT PLUG PIN D38999/26JH35PA Amphenol Aerospace 1: $278.15 59In Stock	Mfr. Part # D38999/26JH35PA Mouser Part # 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	$278.15 $243.87 $215.44	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 66P PLG SZ 19 SKT CBL MNT D38999/26JF35SN Amphenol Aerospace 1: $189.28 73In Stock	Mfr. Part # D38999/26JF35SN Mouser Part # 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	$189.28	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: $267.29 58In Stock	Mfr. Part # D38999/20JJ35SA Mouser Part # 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	$267.29 $253.67	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 39P FM SZ 21 PIN WL MNT D38999/20FG39PN Amphenol Aerospace 1: $103.72 93In Stock	Mfr. Part # D38999/20FG39PN Mouser Part # 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	$103.72 $93.59 $90.72 $87.88	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 128P RCPT SZ 25 PIN PNL MNT D38999/24WJ35PA Amphenol Aerospace 1: $173.33 10In Stock	Mfr. Part # D38999/24WJ35PA Mouser Part # 654-D38999/24WJ35PA	Amphenol Aerospace	Circular MIL Spec Connector 128P RCPT SZ 25 PIN PNL MNT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	10In Stock	$173.33 $149.66 $148.73 $135.75 Quote Quote	Min.: 1 Mult.: 1	No	128 Position	Pin (Male)	25-35	Receptacles	25	Jam Nut	MIL-DTL-38999 III	Crimp	Panel	5 A	Gold	Copper Alloy	38999 Aluminum
Circular MIL Spec Connector 6P ST PLUG PIN SZ 11 D38999/26WB98PA Amphenol Aerospace 1: $123.38 88In Stock	Mfr. Part # D38999/26WB98PA Mouser Part # 654-D38999/26WB98PA	Amphenol Aerospace	Circular MIL Spec Connector 6P ST PLUG PIN SZ 11 Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	88In Stock	$123.38 $111.63 $90.93	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
Circular MIL Spec Connector 22P SIZE 13 STRAIGHT PLUG SKT D38999/26WC35SB Amphenol Aerospace 1: $92.79 108In Stock	Mfr. Part # D38999/26WC35SB Mouser Part # 654-D38999/26WC35SB	Amphenol Aerospace	Circular MIL Spec Connector 22P SIZE 13 STRAIGHT PLUG SKT Learn More about Amphenol Aerospace amphenol mil dtl 38999 iii connectors	Datasheet	108In Stock	$92.79 $84.84 $78.11 $75.51 View $72.94 Quote	Min.: 1 Mult.: 1	No	22 Position	Socket (Female)	13-35	Plugs	13	Straight	MIL-DTL-38999 III	Crimp	Cable	5 A	Gold	Copper Alloy	38999 Aluminum	Each