MS27508E12B4P 4-Pin MIL-DTL-38999 Series III Plug Connector

MIL-DTL-38999 MS27467 Circular Connectors

MS27508E12B4P MIL-DTL-38999 Series III Circular Plug for Marine and Industrial Control

The MS27508E12B4P is a 4-pin MIL-DTL-38999 Series III circular plug connector engineered for marine, shipboard, and industrial control systems where reliability, durability, and compact design are critical. Its rugged aluminum alloy shell and IP67-rated sealing protect against salt spray, water ingress, and dust, making it suitable for harsh onboard and factory-floor environments.

Where This Connector Fits Best

The bayonet quick-lock coupling ensures secure mating under constant vibration and mechanical stress typical of engine rooms, deck machinery, and automation panels. Consider this plug for the following applications:

• Bridge and navigation systems: Reliable signal paths for radar modules, GPS units, and electronic chart display systems.
• Engine room monitoring: Secure connections for temperature sensors, oil pressure modules, and generator feedback circuits.
• Deck machinery controls: Robust interface for winch, crane, and hatch control wiring exposed to saltwater and mechanical stress.
• Automation and control panels: Compact solution for PLCs, distributed I/O systems, and sensor networks on ships and in industrial plants.

Selection and Integration Considerations

Before specifying this connector, verify the following decision points against your system requirements:

• Pin count and circuit type: The 4-pin configuration supports low-current power and signal circuits. Confirm that your circuit count and current requirements match this layout.
• Termination method: Crimp termination provides consistent electrical contact and low resistance. Ensure your assembly tooling and operator training support MIL-spec crimp procedures.
• Environmental limits: The wide operating temperature range from −65°C to +200°C covers extreme conditions, but confirm that your specific cable jacket and sealing accessories are rated for the same range.
• Mating and mounting: This is a plug connector; verify the corresponding receptacle style and panel cutout dimensions for your enclosure before ordering.
• Vibration resistance: The shock-resistant design keeps connections stable in high-stress environments, but confirm the expected vibration profile of your application matches the connector's tested limits.

Application Boundaries

This connector is well suited for shipboard electronics, offshore instrumentation, and industrial control panels where a compact, sealed circular interface is required. It is not intended for high-current power distribution, subsea permanent immersion, or applications requiring frequent unmating under load. For continuous underwater exposure or higher pin counts, confirm the appropriate MIL-DTL-38999 variant or consult the MIL-DTL-38999 MS27467 Circular Connectors range for alternative configurations.

Information to Include With Your Inquiry

To receive an accurate quotation and mating recommendation, prepare the following details:

• Required cable diameter and conductor gauge for crimp termination
• Mating receptacle part number or shell size and arrangement
• Panel thickness and mounting hole dimensions for the receptacle side
• Expected vibration, temperature, and salt-spray exposure levels
• Quantity and target delivery schedule

For related high-density options in the same series, review the MIL-DTL-38999 MS27467 Circular Connectors catalog page to compare shell sizes and contact arrangements before finalizing your specification.