Hermetic Connectors: TE Connectivity Deutsch MIL-DTL-38999 Series I and III

Hermetic connectors are glass-sealed connectors that are designed to operate in extreme environments.

The glass to metal sealing enables the connector to be resistant to most liquids and gas, such as gasoline, jet fuel, oil, acids and hydraulic fluids, amongst others, making it an ideal connector for use in harsh environments ranging from satellites to submarines.

Air Electro has a broad range of hermetic connector offerings, ranging from circular to d-subminiature connectors. Our hermetic connectors are qualified to a variety of military specifications, including MIL-DTL-38999, MIL-DTL-26482, MIL-DTL-83723, MIL-DTL-24308, MIL-DTL-5015 as well as custom-designed hermetic connectors.

For Mil-spec hermetic connectors Air Electro is a franchised stocking distributor for TE Connectivity (Deutsch) as well as Glenair, carrying the major circular mil specs such as MIL-DTL-38999, MIL-DTL-26482, and MIL-DTL-83723. In addition, we stock and distribute Souriau-Sunbank by Eaton’s hermetic connectors as commercial equivalents to MIL-DTL 26482.

Let’s dive into the Hermetic Connector solutions offered by Air Electro. Today we are looking at the TE Connectivity Deutsch MIL-DTL-38999 Series I, III Hermetic EN3645 Connectors.

TE Connectivity Deutsch hermetic MIL-DTL-38999 series I and III (EN3645) provide a superior performance where most robust connectors fail. Air Electro stocks a large amount of MIL-DTL-38999 I and III and can assist in a variety of desired applications. Hermetic termination styles include solder cups, eyelets, PC tails, weld tabs and crimp termination. These connectors are used for high-performance applications and are glass-to-metal sealing used for harsh environments.

  • Modified flanges
  • Any termination style
  • Special materials (such as titanium)
  • High-temperature and cryogenic materials
  • Ability to withstand high pressure


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