Circular Connectors: MIL-DTL-38999 Connectors

Air Electro distributes and assembles a variety of circular connectors for commercial, military and industrial applications. Our circular connector lines consist of Mil-Spec, Boeing approved (BACC), Airbus approved (EN), Hermetic connectors, Filter connectors and Souriau-Sunbank by Eaton’s industrial Trim Trio line.

Mil-Spec connector offerings are MIL-DTL-38999 series I, II & III, MIL-DTL-26482 series I & II, MIL-DTL-83723, MIL-DTL-26500 and MIL-DTL-5015. Boeing approved connectors consist of BACC45 and BACC63. Airbus approved connectors include EN3645 and EN3646. Industrial Trim Trio connector offerings include the UTS, UTG, UTO, MBG and UTV series. Commercial equivalents are available for MIL-DTL-38999 series I, II & III, MIL-DTL-26482 series I & II, MIL-DTL-83723, MIL-DTL-26500, MIL-DTL-5015, Souriau 851, 8525 and 8526.

Custom circular connectors are also available through Air Electro’s manufacturing division.

Air Electro has authorized distribution partnerships with value-added and kitting capabilities for the following connector manufacturers:

Souriau-Sunbank by Eaton, Corsair, RMS, Glenair, Filconn, Deutsch

Today We Will be Diving Deeper into Circular Connectors and look at the MIL-DTL-D38999 line.

MIL-DTL-D38999 Connectors

Air Electro stocks and offers value-added capabilities on MIL-DTL-38999 connectors. As an authorized distributor for all of our MIL-DTL-38999 products, we stock individual connector components allowing us to build millions of different part numbers. With these unique capabilities, we can match your exact design requirements and modify any connector to your specifics.

Throughout the years, we have developed unique relationships with our suppliers allowing us to add value to any MIL-DTL-38999 connector and offer the fastest delivery in our industry.

Make Air Electro your first choice when sourcing for MIL-DTL-38999 through: Souriau-Sunbank by Eaton, Corsair, Glenair and TE Connectivity-Deutsch.

Souriau-Sunbank by Eaton MIL-DTL-38999 Series I Connectors (8LT Series)

The D38999 Series I connector is a circular, high-density bayonet style with shell sizes ranging from 9 to 25 with over 50 QPL approved insert arrangements available. It was designed for high-performance requirements for military and aerospace cable to panel applications. Other applications can include marine and communication equipment, medical instrumentation, weapon systems, armored carriers and tanks and test equipment.

SOURIAU MIL-DTL-38999 Series III Connectors (8D Series, EN3645, BACC63)

The 8D series is a highly reliable connector compliant to the main standards (MIL-DTL-38999 series III, EN3645, BACC63) and answer the most stringent requirements in harsh environments.

Available in 5 high-end materials and 5 platings (8D aluminum, 8D composite, 8D titanium, 8D stainless steel and 8D bronze), the 8D series connectors fit all the corrosion, shock, endurance or firewall capability you will encounter.

A full range of contacts are also available with 8D connectors such as signal transmission, high-speed data transmission (quadrax, twinax, coax, ELIO®). 54 QPL layouts are available in accordance with MIL-STD-1560.

The 8D series is compliant with the MIL standard connector design with unique self-locking mechanism (patented by SOURIAU), visual mating indication, scoop proof, quick screw coupling and 360° shielding. The patented self-locking system and the metallic contact retention clip technology make the product perfect for high vibration applications or rough handling in the field.

8D connectors offer concrete RoHS alternative to cadmium. SOURIAU has more than 10 years of experience in producing Zn Ni with continuous improvements to comply with military and aerospace harsh environment conditions. Zn Ni connectors are the first one to be qualified by US Defense standards organization (DLA Land and Maritime). It provides the most cost-effective solution for a cadmium alternative finish.

  • Self-locking coupling mechanism
  • Contact protection
  • Quick coupling – 11/4 turn to mate
  • Visual mating indication
  • EMI shielding
  • D38999, EN3645 or BACC63 standard part numbering
  • 8D part numbering for commercial cost-effective solution

Corsair MIL-DTL-38999 Series I (MS274**)

Corsair subminiature cylindrical connectors are qualified to MIL-DTL-38999 standard, Series I and II. Often used in the aerospace industry, these connectors are the most reliable products in the industry. MIL-DTL-38999 connectors offer concrete RoHS alternative to cadmium with black zinc nickel, nickel and stainless steel.

Connector Features:

  • Contact Protection
  • Quick Positive Coupling
  • Error Proof Alternate Positioning
  • EMI Shielding
  • Variety of Shell Styles
  • Multiple Contact Options
  • Fixed Solder Contacts
  • Hermetic Versions
  • “Breakaway” Lanyard Release Style – available in LJT plugs.
  • Inventory Support Commonality
  • RoHS Compliant Product Available

As a premier authorized distributor of Corsair MIL-DTL-38999 Series I (MS27468), Air Electro offers 48-hour value-added and assembly capabilities for all of your custom needs. We stock a full range of shell types, sizes, plating options and insert arrangements.

Corsair MIL-DTL 38999 II (MS274** Series)

Corsair MIL-DTL-38999 series II connectors are used in performance military and civil aviation applications that demand reliable connections in some of the harshest environments. MIL-DTL-38999 Series II connectors have to deliver exceptional performance under wide temperature ranges, high vibrations, and be resistant to a vast array of pollutants. Corsair’s version of the series II is a match to all the Souriau and Amphenol JT series connectors.

Air Electro stocks all the mil prefix numbers for your MIL-DTL-38999 Series II connectors including:

MS27472, MS27473, MS27474, MS27484, MS27497, MS27499, MS27500, MS27508 and MS27513.

As a value-added, stocking distributor for Corsair, Air Electro is a premier source for MIL-DTL-38999 Series II connectors, with a 48-hour value-added turnaround time as well as ample stock on the full breadth of shell types, sizes, plating options and insert arrangements.

Corsair MIL-DTL-38999 Series III (MS274**)

MIL-DTL-38999 Series III utilizes rear release contact retention in 9 shell sizes (A to J) in a variety of insert arrangements and contact sizes, (22D, 22M, 22, 16, 12, 8, 4 and 0 gage). Triple Start Threaded coupling mechanism: polarization accomplished by Shell rotation. Originally designed for the high-performance requirements of military and commercial aviation, these circular connectors are perfect for applications requiring extremely reliable interconnections.

As a value-added, stocking distributor for Corsair, Air Electro is a premier source for MIL-DTL-38999 Series II connectors, with a 48-hour value-added turnaround time as well as ample stock on the full breadth of shell types, sizes, plating options and insert arrangements.

Filconn USB and D38999 Ruggedized Connectors

The FilConn thumb drive provides up to 128gb of memory capability in a very durable and compact configuration.

Mil-38999 connector interface provides a reliable mechanism for continuous mating cycles and durability when not in use. This product is available in USB 2.0, USB 3.0, and eSata configurations.

Filconn’s conversion connector is a simple way to convert the standard commercial USB interface to a high-reliability harsh environment mil-circular configuration.

The USB conversion connector is offered in many different sizes and shape options including Jam nut, flange mount, or side mount attachment styles.

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

MIL-DTL-38999 Hermetic Connectors (Series I, II, II, IV)

Glenair’s hermetic connectors are glass sealed connectors designed to perform efficiently in extreme and harsh environments. The glass to metal sealing configuration enables the connector to be resilient to gas and liquids such as airplane gasoline, oils, hydraulic fluids, amongst many others. Glenair takes the hermetic connectors to the next level, offering CODE RED technology. Traditionally, glass-to-metal sealing has been the “gold standard” of hermetic sealing, new lightweight encapsulant sealing technology from Glenair, called CODE RED, brings mission-critical hermetic sealing with more efficient contact electrical performance and a drastic reduction in weight.

At Air Electro, we stock and offer the same day shipping on various hermetic connectors including MIL-DTL-38999, MILT-DTL-26482 and MIL-DTL-83723. With a full engineering team, we also offer custom design connectors for all of your custom projects.

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