MS27473 Series Connectors MIL-DTL-38999 Series II for Avionics

MS27473 Series Connectors: MIL-DTL-38999 Series II Low-Profile High-Density Circular Connectors

Engineered to meet MIL-DTL-38999 Series II military specifications, the MS27473 series is a lightweight, space-saving connector built for compact, high-demand aerospace, defense, and industrial applications where limited installation space and extreme reliability are critical. We offer the full MS27473 lineup, with 2–128 pin counts available to match your system's exact needs.

Available Models and Customizable Options

We stock the full range of MS27473 series models, covering various shell sizes and pin counts to fit diverse application needs. Common models include:

• MS27473T12B02P: small shell size, suitable for micro signal transmission
• MS27473T12B04S: low-pin configuration, ideal for simple circuit connections
• MS27473T15B11P: medium pin count, meeting multi-channel signal requirements
• MS27473T18B22S: cost-effective option for industrial control modules
• MS27473T21B35P: multi-pin integration, suitable for secondary avionics systems
• MS27473T23B51S: high-density configuration, meeting complex equipment signal integration needs
• MS27473T25B61P: large pin count option for large industrial control panels
• MS27473T31B128S: ultra-high density, suitable for satellite communication and high-end avionics systems

Core Advantages of MS27473 Connectors

Low-Profile Design + Flexible Pin Counts

The ultra-thin shell, a signature of MIL-DTL-38999 Series II, fits tight installation spaces, paired with 2-128 contacts (0.8mm-2.7mm diameters) to support everything from small signal setups to high-density multi-channel systems.

Quick Bayonet Lock + Lightweight Durability

Its 3-pin bayonet coupling enables 1/4-turn blind mating with anti-mislocation protection for fast, hassle-free field installations. The aluminum alloy housing, or corrosion-resistant stainless steel, keeps weight low—ideal for aerospace and portable military gear—with 500+ mating cycles and 500h salt spray resistance.

Extreme Environment Readiness

With a -65°C to +200°C operating range and IP67/IP68 sealing, plus PEI/PPS or ceramic insulation, the MS27473 delivers stable 600V AC/23A transmission in extreme heat, cold, or moisture—trusted for marine offshore and high-vibration industrial setups.

Ideal Applications

• Aerospace cabin avionics & UAV systems
• Compact military communication gear
• Miniaturized industrial control panels
• Marine offshore monitoring equipment

Selection Considerations

When choosing an MS27473 connector, verify the shell size and contact arrangement against your panel cutout and mating requirements. Confirm whether you need a plug (P) or receptacle (S) configuration, and check that the contact diameter matches your wire gauge and current load.

Mating and Installation Notes

The bayonet coupling requires proper alignment of the three pins before the 1/4-turn lock. For panel-mount versions, confirm the mounting hole pattern and shell dimensions against your enclosure. Field-wireable options require careful attention to contact crimping and insertion tooling to maintain the IP67/IP68 seal.

Inquiry Checklist

To receive an accurate quotation and matching recommendation, please provide:

• Mating-side connector requirement (plug or receptacle, shell size)
• Pin count and contact arrangement or drawing
• Cable outside diameter and conductor size
• Electrical load (current and voltage)
• Operating environment (temperature, moisture, vibration)
• Order quantity and target delivery timeline

For related military-grade circular connector options, review the MS27473 Military Connector catalog or explore the 12G Series Circular Connectors for alternative industrial applications.