Description Related Cases Related Application Product Catalog Reviews
Language
РусскийespañolعربيPortuguês
YOUR POSITION：HOME > Industry > Marine & Offshore Connectors >
military grade connector
< >

MS27473E12B4S Circular Connector for Deck Equipment and Outdoor Use

>Number Of CoresNumber Of Cores 4 Pins
Contact DiameterContact Diameter(mm) 1.02 mm
IP RatingIP Rating IP67
Shell MaterialShell Material Aluminum Alloy
Temperature RangeTemperature Range -65°C to +175°C
TerminationTermination Crimp
Rated CurrentRated Current(A) 7.5A
Rated VoltageRated Voltage(Ac.V) 600V
Test VoltageTest Voltage(Ac.V)1Min 1800V
Insulation ResistanceInsulation Resistance (MΩ) ≥ 5000 MΩ
Contact ResistanceContact Resistance (MΩ) ≤ 3 mΩ
CertificationCertification CE, RoHS,BASCI,ISO9001
Get Quote
+86-19924482730

MS27473E12B4S 4-Pin Circular Socket Connector – Shell Size 12, Series II, IP67 Bayonet Lock


The MS27473E12B4S is a 4-pin MIL-DTL-38999 Series II circular socket connector engineered for marine, shipboard, and industrial environments where durability, compactness, and reliability are essential. Its Shell Size 12 configuration allows for multiple signal or low-power connections in tight spaces without compromising performance.

Built with a high-strength aluminum alloy shell, this connector is designed to withstand corrosion, vibration, and harsh environmental conditions, making it ideal for navigation systems, industrial machinery, and control modules. The bayonet coupling mechanism ensures secure and stable mating, even under mechanical stress or high-vibration conditions.

With crimp termination and IP67 sealing, the MS27473E12B4S guarantees consistent electrical performance while providing protection against dust, moisture, and saltwater exposure. Its wide temperature range ensures operation from -65°C to +175°C, making it suitable for extreme marine or industrial environments.

38999 alternative connector


Key Advantages

Space-Saving 4-Pin Socket – Efficient integration in compact systems.

Robust Environmental Sealing – IP67 protection for wet and dusty conditions.

Corrosion-Resistant Aluminum Shell – Long-term reliability in harsh environments.

Bayonet Locking Mechanism – Ensures secure connections with vibration resistance.

Wide Operating Temperature – Reliable performance from -65°C to +175°C.

The MS27473E12B4S delivers a dependable, compact, and rugged solution for marine and industrial applications where high-reliability electrical connections are critical.

Item

Parameters

Number of Cores

4Pins

Gender

Male/Female

Housing Material

Aluminum Alloy

Cores Material

Brass Plated with Gold

Insulator Material

PEFT

Locking System

Bayonet Coupling

Temperature Range

-65°C to +175°C

Rated Current (A)

7.5A

Rated Voltage (AC.V)

600V

Test Voltage (AV.C)1Min

1800V

Insulation Resistance (㏁)

5000㏁

Contact Resistance (㏁)

≤3㏁

Termination

Crimp


Related Products

More》

Related Resource


MS connector
Related Cases
KMYD Connectors KNOWS WHAT YOU NEED,
MS27473E12B4S Circular Connector for Deck Equipment and Outdoor Use Market Leader！
SP21 Waterproof Connector for Fishing Light Lighting in the United States
SP21 Waterproof Connector for Fishing Light Lighting in the United States
SP21 Waterproof Connector – the perfect fit for marine LED fishing lights! Engineered for US marine environments, this 9pin connector solves humidity, salt corrosion, and space issues. With IP68 protection, brass nickel-plated contacts, and ABYC C-5/UL 508 compliance, it resists salt fog over 500 hours. Compact Ø21mm×L36mm design halves installation time. 30A rating supports 5–25W lights, reducing failure rates to 0.3% and cutting maintenance costs by 80%, fully complying with USCG.
Related Application
Deep-Sea Exploration

Deep-Sea Exploration...

Built with titanium alloy or marine-grade engineered plastics, these connectors resist seawater corrosion, extreme press...

MORE→
1
Ship Engine Room Control System

Ship Engine Room Control System...

Ensure peak performance signal connectivity for control, monitoring, and automation systems. Discover vibration-resista...

MORE→
2
Ocean-Monitoring Buoys

Ocean-Monitoring Buoys...

A floating buoy is an anchored or drifting device equipped with sensors to monitor physical, chemical, or biological par...

MORE→
3
Marine Navigation Radar

Marine Navigation Radar...

These Waterproof Connectors optimize anti-collision radar performance in commercial shipping, fishing, and leisure vesse...

MORE→
4
Related Catalog
Learn More
MS27473 Military Connector
PDF
Download Resources
Get More Downloads >

Customer Reviews

   

Write a Review
Score
 Remove

Review Title

Review Text

   Durable Outdoor Performance


AmberNotebook  2026-02-04

The SP13 3-pin version resists moisture and dust while keeping a strong connection.
   Precise Assembly


PhantomCartX  2026-02-04

M8 Connectors fit perfectly and are very easy to install.
   Compact Waterproof Connector


NeonNomadX  2026-02-04

SP13 Connectors are lightweight, sealed tightly, and work reliably in outdoor environments.
   Long Service Life


DriftPixel  2026-02-04

M12 Connectors maintain performance even after repeated use.
Need Help?
Please leave your contact information to get our latest catalog
Get In Touch Now >
KMYD Connectors

Tel: +8619924482730

Email: info@kmydconnector.com

MP/WhatsApp: +86-19924482730

Manufacturer Address:Baoan District, Shenzhen City, Guangdong Province,China

NEW KEYWORD

About Us

Products

Information

Website Map YouTube
Copyright © 2026 KMYD CONNECTOR ALL RIGHTS RESERVED​