MIL-DTL-38999 Series III Type │ 8D Series │D38999 Circular Connectors

8D Series Connector Guide

MIL-DTL-38999 Series III – MIL-C-38999 Series III Connectors for Military, Aerospace & Industrial Applications

The 8D Series of circular connectors is designed to withstand requirements of industrial, military and aerospace applications, built to MIL-DTL-38999, EN3645 and BACC standards, meeting or exceeding requirements for durability and performance. The 8D series is the most advanced circular connector range in the Eaton Souriau MIL-DTL-38999 Series III series, promoting high contact density, quick screw coupling mechanisms and high resistance to harsh environments. Connectors within this range can accommodate up to 128 #22D contacts with a range of contact types including PC Tail, Crimp, Solder Cup, Wire Wrap, Quadrax, Coax, Twinax, Triax, ELIO Fiber Optic and Expanded beam. With five materials and platings to choose from including Aluminum, Composite, Stainless Steel, Titanium and Bronze.

Servo & Electronic Sales Ltd is a value-added distributor for Eaton Souriau 8D Circular Connectors with a turnaround of 48 Hours for standard series and 72 Hours for K Class (Stainless Steel).


8D Main Features

  • Quick Assembly – 48 Hour Turnaround on Eaton Souriau 8D Series
  • Complete Solution – Purchase the complete connector solution in one place, with backshells and accessories designed to meet your connector requirements.
  • MIL-Spec Qualified – Eaton Souriau 8D series connectors are qualified to MIL-DTL-38999 Series III, EN3645 and BACC


D38999/20 Type │Square Flange Receptacle (8D0)

D38999/20 Type │Square Flange Receptacle (8D0)

The 8D0 (D38999/20 Type) is a Square Flange Receptacle featuring four-hole square flange for easy mounting.

ManufacturerConnector SeriesMating Half
MIL-DTL-38999 Series IIID38999/20D38999/26
Eaton Souriau8D08D5

D38999/24 Type │Jam Nut Receptacle (8D7)

D38999/24 Type │Jam Nut Receptacle (8D7)

The 8D7 (D38999/24 Type) is a Jam Nut Receptacle with single-hole mounting and an integrated O-ring.

ManufacturerConnector SeriesMating Half
MIL-DTL-38999 Series IIID38999/24D38999/26
Eaton Souriau8D78D5

D38999/26 Type │Plug with RFI Shielding (8D5)

D38999/26 Type │Plug with RFI Shielding (8D5)

The 8D25 (D38999/26 Type) is a Plug with RFI sheilding which mates with all MIL-DTL-Series III receptacles.

ManufacturerConnector SeriesMating Half
MIL-DTL-38999 Series IIID38999/26D38999/20, D38999/24
Eaton Souriau8D58D0, 8D1, 8D7

In-Line Receptacle (8D1)

In-Line Receptacle (8D1)

The 8D1 is an In-Line Receptacle mounts on cable cords, the 8D1 series is compatible with all D38999 Series III plugs.

ManufacturerMating Half
MIL-DTL-38999 Series IIID38999/26
Eaton Souriau8D5

Hermetic MIL-DTL-38999 Series III Type Connectors

The Hermetic 8D Series consists of receptacle connectors with threaded coupling system designed to withstand harsh environments within aerospace applications, built to MIL-DTL-38999 and EN3645 standards, meeting or exceeding requirements for durability and performance. The Hermetic 8D series consists of Eaton Souriau and Detoronics, who both supply equivalents to the Mil-Spec Hermetic range. Hermetic connectors feature glass-fused inserts to create an airtight seal, compatible with all D38999 Plugs. The Eaton Soruiau 8D Series features signal and power contacts up to size #4 with Square Flange Receptacle (8D0), Solder Mount Receptacle (8D1), Weld Mount Receptacle (8D4) and Jam Nut Receptacle (8D7). The Detoronics DJLT Series includes Solder Cup, Eyelet and Feedthrough Contacts with Square Flange Receptacle (DJLHT21), Solder Mount Receptacle (DJLHT25), Weld Mount Receptacle (DJLHT27) and Jam Nut Receptacle (DJLHT23)


D38999/21 Type │Hermetic Square Flange Receptacle (8D0 / DJLHT21)

D38999/21 Type │Hermetic Square Flange Receptacle (8D0/ DJLTH21)

The 8D0/ DJHLT21 (D38999/21 Type) is a Square Flange Receptacle Hermetic Connector is intermateable with all D38999 Plugs.

ManufacturerConnector SeriesMating Half
MIL-DTL-38999 Series IIID38999/21D38999/26
Eaton Souriau8D08D5
DetoronicsDJHT21Any D38999 Plug

D38999/23 Type │Hermetic Jam Nut Receptacle (8D7 / DJLHT23)

D38999/23 Type │Hermetic Jam Nut Receptacle (8D7/ DJLTH23)

The 8D7/ DJHLT23 (D38999/23 Type) is a Jam Nut Receptacle Hermetic Connector is intermateable with all D38999 Plugs.

ManufacturerConnector SeriesMating Half
MIL-DTL-38999 Series IIID38999/23D38999/26
Eaton Souriau8D78D5
DetoronicsDJHT23Any D38999 Plug

D38999/25 Type │Hermetic Solder Mount Receptacle (8D1 / DJLHT25)

D38999/25 Type │Hermetic Solder Mount Receptacle (8D1/ DJLTH25)

The 8D1/ DJHLT25 (D38999/23 Type) is a Jam Nut Receptacle Hermetic Connector is intermateable with all D38999 Plugs.

ManufacturerConnector SeriesMating Half
MIL-DTL-38999 Series IIID38999/25D38999/26
Eaton Souriau8D18D5
DetoronicsDJHT25Any D38999 Plug

D38999/27 Type │Hermetic Weld Mount Receptacle (8D4 / DJLHT27)

D38999/25 Type │Hermetic Solder Mount Receptacle (8D4/ DJLTH25)

The 8D4/ DJHLT25 (D38999/23 Type) is a Jam Nut Receptacle Hermetic Connector is intermateable with all D38999 Plugs.

ManufacturerConnector SeriesMating Half
MIL-DTL-38999 Series IIID38999/27D38999/26
Eaton Souriau8D48D5
DetoronicsDJHT27Any D38999 Plug

D38999/27 Type │Hermetic Weld Mount Receptacle (8D4 / DJLHT27)

D38999/25 Type │Hermetic Solder Mount Receptacle (8D4/ DJLTH25)

The 8D4/ DJHLT25 (D38999/23 Type) is a Jam Nut Receptacle Hermetic Connector is intermateable with all D38999 Plugs.

ManufacturerConnector SeriesMating Half
MIL-DTL-38999 Series IIID38999/27D38999/26
Eaton Souriau8D48D5
DetoronicsDJHT27Any D38999 Plug

Contact Us

  • Quick Assembly – 48 Hour Turnaround on Eaton Souriau 8D Series
  • Complete Solution – Purchase the complete connector solution in one place, with backshells and accessories designed to meet your connector requirements.
  • MIL-Spec Qualified – Eaton Souriau 8D series connectors are qualified to MIL-DTL-38999 Series III, EN3645 and BACC

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