LIGHT-WEIGHT, LOW-PROFILE, SPACE-SAVING DESIGN

The Amphenol MIL-DTL-38999 series II JT connector offers high-density contact arrangements and shell types in a small size. They were designed for high-performance requirements, including military and commercial aviation applications that require a very low profile. The Amphenol MIL-DTL-38999 series II JT connector is environmentally-sealed and have a wide operating temperature range to meet the demand of harsh environments/conditions.
The Amphenol JT series connector is intermateable with Souriau and all MIL-DTL-38999 series connectors, and were formerly called MIL-C-38999. A broad range of military and commercial accessories are also available. See our full list of Amphenol JT connector MIL-DTL-38999 series II features in the specifications below.

Get shopping! Mil spec part number prefixes include MS27472, MS27473, MS27474, MS27484, MS27497, MS27499, MS27500, MS27508 and MS27513.

FEATURES

• High-Reliability
  MIL-DTL-38999 series II - JT style connectors are used in performance aircraft that demand reliable connections in some of the most rigorous environments. The connectors must perform flawlessly under wide temperature ranges, high vibrations, and be resistant to a vast array of contaminants.
• Low-Profile Connector Design
  JT's require a fraction of the space needed to mate most other high-performance connectors, permitting use in areas that would be impossible for other mating systems.
• Light-Weight
  Today's aircraft designs require connectors that are very light-weight. Saving weight on the connector systems allows the aircraft to carry more fuel, maximizing its range or payload-carrying capacity.
• High-Density Connectors
  JT connectors offer up to 128 contacts per connector. Ideally-suited for the demands of today's digital electronics that are used on fly-by wire aircraft, advanced robotics, and critical industrial equipment.
• Operates at Extreme Temperatures
  These connectors will operate in temperatures from -85°F to +392°F (-65°C to +200°C)
• Quick-Mating Coupling Systems
  Three-point bayonet coupling nuts provide fast, one-third-turn connector mating. Mating is easily verified with an audible and tactile "click" and a bayonet pin sighting hole located in the coupling nut.
• Broad Range of Military and Commercial Accessories
  Many military-standard endbells to MIL-C-85049 specifications and a wide array of cable termination styles are available. Straight, 45- and 90-degree endbells come in many styles from low-cost, standard clamp to shielded, environmentally-sealed.
• MIL-DTL-38999 Approved
  JT's are fully-intermatable and intermountable with all other MIL-DTL-38999 series II connectors.

Materials & Finishes

Electrical Data

Test Voltage (unmated condition)

Operating Voltage

Current Rating by Contact Size & Wire Accommodation (Test Amps)

Contact Resistance of Mated Contacts End-to-End

Insulation Resistance  5,000 megohms minimum

* Inactive for new designs

Mechanical

Wire Sealing Range

Insulation Strip Length

All dimensions in inches (millimeters in parenthesis)

* Inactive for new designs

Cross-Section

AMPHENOL JT SERIES EXCERPT FROM MIL-DTL-38999K

3.43.2 JAN brand. The United States Government has adopted, and is exercising legitimate control over the certification marks “JAN” and “J”, respectively, to indicate that items so marked or identified are manufactured to, and meet all the requirements of military specification. Accordingly, items acquired to, and meeting all of the criteria specified herein and in applicable specifications shall bear the certification mark “JAN” except that items too small to bear the certification mark “JAN” shall bear the letter “J”. The “JAN” or “J” shall be placed immediately before the PIN except that if such location would place a hardship on the manufacturer in connection with such marking, the “JAN” or “J” may be located on the first line above or below the PIN. Items furnished under contracts or orders which either permit or require deviation from the conditions or requirements specified herein or in applicable specifications shall not bear “JAN” or “J”. In the event an item fails to meet the requirements of this specification and the applicable specification sheets or associated detail specifications, the manufacturer shall remove the “JAN” or the “J” from the sample tested and also from all items represented by the sample. The “JAN” or “J” certification mark shall not be used on products acquired to contractor drawings or specification. The United States Government has obtained Certificate of Registration No. 504,860 for the certification mark “JAN”.

Note: The “JAN” or “J” is not part of the PIN but indicates a certification.

PIN = Part Identification Number