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MIL-DTL-38999 Series III Connectors
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MS27505E17B35P Circular Connector for Marine, Shipboard and Industrial Control Systems

>Number Of CoresNumber Of Cores 55Pins
Contact DiameterContact Diameter(mm) 1.02 mm
IP RatingIP Rating IP67
Shell MaterialShell Material Aluminum Alloy
Temperature RangeTemperature Range −65°C to +200°C
TerminationTermination Crimp
Rated CurrentRated Current(A) 5A
Rated VoltageRated Voltage(Ac.V) 500V
Test VoltageTest Voltage(Ac.V)1Min 1500V
Insulation ResistanceInsulation Resistance (MΩ) ≥5000MΩ
Contact ResistanceContact Resistance (MΩ) ≤5MΩ
CertificationCertification CE, RoHS,BASCI,ISO9001
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The MS27505E17B35P is a 55-pin circular plug connector engineered for the toughest marine and industrial environments. Its MIL-DTL-38999 Series III design ensures reliable, high-density signal connections in shipboard systems, offshore platforms, and industrial control panels.

D38999 Connectors


Marine-Grade Reliability

Constructed with a corrosion-resistant aluminum alloy shell and IP67-rated sealing, the connector withstands salt spray, high humidity, mechanical vibration, and temperature extremes common in marine and offshore applications.

Waterproof Connectors


Versatile Shipboard Applications

Bridge Systems: Radar, GPS, navigation electronics

Engine Room Monitoring: Sensors, generator controls, alarms

Deck Equipment: Winches, cranes, hatch controls

Automation Panels: PLCs, distributed I/O, sensor networks

Communication Networks: Internal ship communications, alarms, control signals

IP67 Connectors


Electrical & Mechanical Performance

55-pin configuration for multi-signal circuits

Bayonet quick-lock ensures secure mating under vibration

Crimp termination delivers low contact resistance and high reliability

Wide temperature operation: −65°C to +200°C

MS27505E17B35P combines compact design, high reliability, and environmental resistance, making it ideal for complex marine and shipboard systems where durability and performance are critical.

Item

Parameters

Number of Cores

6Pins

Gender

Female

Housing Material

Aluminum Alloy

Cores Material

Brass Plated with Gold

Insulator Material

PEFT

Locking System

Bayonet Coupling

Temperature Range

-65°C to +200°C

Rated Current (A)

5A

Rated Voltage (AC.V)

500V

Test Voltage (AV.C)1Min

1500V

Insulation Resistance (㏁)

5000㏁

Contact Resistance (㏁)

≤5㏁

Termination

Crimp


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MIL-DTL-38999 Series III Connectors
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Customer Reviews

   

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   Long Service Life


DriftPixel  2026-02-04

M12 Connectors maintain performance even after repeated use.
   Strong Power Handling


UrbanSailor  2026-02-04

M5 Connectors deliver stable power with excellent build quality.
   Compact and Stable


QuietHarborX  2026-02-04

M5 Connectors are small yet very reliable, perfect for tight installations.
   Heavy-Duty Build!


MoonCoffee  2026-02-04

SP21 9-pin connectors are tough, durable, and suitable for demanding industrial setups.
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