Glass to Metal Seal Connectors

Hermetic Glass to Metal Seal Connectors for Aerospace, Defense, Vacuum & Harsh Environment Applications

By permanently bonding glass insulators to metal housings through a controlled thermal sealing process, GTMS connectors create a hermetic barrier that protects sensitive electronics against moisture ingress, gas leakage, pressure differentials, corrosive media, and extreme operating temperatures.

Our hermetic connector solutions are widely deployed in aerospace systems, defense electronics, vacuum equipment, subsea instrumentation, energy exploration tools, and other harsh-environment applications where conventional connectors cannot provide sufficient protection.

Why Choose Glass to Metal Seal Connectors

When equipment operates in extreme environments, connector reliability becomes a critical design factor. Our glass to metal seal connectors are engineered to maintain electrical integrity and hermetic performance throughout extended service life.

Key Benefits

• Reliable hermetic sealing for critical systems
• Excellent resistance to moisture, gases, and contaminants
• Stable electrical performance under harsh operating conditions
• High resistance to vibration, shock, and pressure cycling
• Wide operating temperature range
• Long-term corrosion resistance
• Multiple shell materials and contact configurations available
• Custom engineering support for specialized applications

Technical Specifications

Dual Glass-to-Metal Sealing Technologies

Different operating environments require different sealing approaches. HUADA supports both Compression Seal and Matched Seal technologies to optimize performance for specific application requirements.

Compression Seal Technology

Compression sealing utilizes a metal shell with a higher coefficient of thermal expansion than the glass insulator.

During manufacturing, the metal housing contracts around the glass as the assembly cools, generating permanent compressive forces that create an exceptionally robust hermetic seal.

This design is ideal for:

• High-pressure environments
• Downhole oil and gas tools
• Subsea equipment
• Heavy industrial systems
• Applications with severe vibration and shock

Matched Seal Technology

Matched seal technology combines specialized Kovar alloys with glass materials engineered to have nearly identical thermal expansion characteristics.

This minimizes internal stress throughout thermal cycling and significantly improves dimensional stability.

Matched seals are preferred for:

• Aerospace systems
• Satellite electronics
• Vacuum equipment
• Scientific instrumentation
• Extreme thermal cycling environments

Standard Connector Families

Our product portfolio includes a variety of industry-standard connector platforms as well as fully customized hermetic interconnect solutions.

MIL-DTL-38999 Compatible Hermetic Connectors

High-density circular connectors designed for aerospace, avionics, and defense platforms requiring superior environmental sealing and electrical performance.

MIL-DTL-26482 Compatible Hermetic Connectors

Compact bayonet-coupling connectors suitable for industrial automation, communications equipment, and ruggedized electronics.

MIL-DTL-5015 Compatible Hermetic Connectors

Heavy-duty threaded connectors capable of supporting high-current power transmission in demanding environments.

MIL-DTL-83723 Compatible Hermetic Connectors

Designed for high-temperature and high-vibration applications commonly found in propulsion systems and aerospace platforms.

Custom Hermetic Connector Solutions

Our engineering team can develop custom configurations based on customer drawings, specifications, or performance requirements.

Customization options include:

• Contact quantity
• Contact arrangement
• Shell size
• Shell material
• Mounting configuration
• Termination style
• Pressure requirements
• Temperature requirements
• Electrical performance requirements

Available Termination Options

To accommodate different installation methods and system architectures, we offer multiple contact termination styles:

Solder Cup

Provides secure wire termination for field wiring and cable assemblies.

PCB Tail

Allows direct integration into printed circuit boards for compact electronic systems.

Eyelet Contacts

Suitable for specialized wiring layouts and compact installations.

Weld Tabs

Designed for applications requiring permanent electrical connections and high mechanical strength.

Typical Applications

Aerospace & Avionics

• Flight control systems
• Cockpit instrumentation
• Fuel management systems
• Pressure bulkheads
• Satellite subsystems

Defense Electronics

• Radar systems
• Missile guidance platforms
• Secure communication equipment
• Ground vehicle electronics
• Naval defense systems

Vacuum & Scientific Equipment

• Vacuum chambers
• Semiconductor manufacturing tools
• Particle accelerators
• Mass spectrometers
• Research instrumentation

Oil, Gas & Energy

• Downhole logging tools
• Drilling instrumentation
• Pressure monitoring systems
• Geophysical exploration equipment

Marine & Subsea Systems

• Underwater sensors
• Sonar equipment
• Subsea communication systems
• Offshore monitoring devices

Industrial Automation

• Process control equipment
• Industrial sensors
• Robotics systems
• Environmental monitoring equipment

Manufacturing & Quality Assurance

HUADA GROUP maintains rigorous quality control throughout the manufacturing process to ensure consistent hermetic integrity, dimensional accuracy, and electrical performance.

Our production capabilities support:

• High-reliability manufacturing processes
• Precision glass-to-metal sealing
• Leak testing and verification
• Custom engineering support
• Prototype and production quantities
• Flexible production scheduling

Every connector is manufactured with a focus on long-term reliability and performance in critical operating environments.

Engineering Support & Cross-Reference Services

Need to replace an obsolete connector, reduce lead times, or identify an equivalent alternative to an existing hermetic interconnect?

Our engineering team provides:

• Part number cross-reference support
• Connector replacement recommendations
• Drawing review services
• Custom design assistance
• Rapid RFQ response
• Prototype development support

Whether you have a legacy connector specification, technical drawing, or complete BOM, we can help identify the most suitable solution for your application.

Request a Quote

Looking for a reliable supplier of glass to metal seal connectors?

Contact HUADA GROUP today to discuss your project requirements. Our engineers will help you select or develop the right hermetic connector solution based on your electrical, mechanical, and environmental specifications.

Send us your drawing, specification sheet, or BOM for a fast technical review and quotation.

Frequently Asked Questions

What is a Glass to Metal Seal Connector?

A glass to metal seal connector is a hermetic electrical connector that uses glass as the insulating and sealing medium between conductive contacts and a metal housing. The resulting seal prevents gas, moisture, and contaminants from entering sensitive electronic systems.

What is the difference between Compression Seal and Matched Seal technology?

Compression seals provide exceptional pressure resistance and mechanical strength, while matched seals offer superior thermal cycling performance and dimensional stability.

What industries commonly use hermetic connectors?

Hermetic connectors are widely used in aerospace, defense, vacuum systems, oil and gas exploration, medical devices, scientific instrumentation, and subsea equipment.

Can you provide custom hermetic connector solutions?

Yes. We support custom shell designs, contact layouts, materials, mounting configurations, termination styles, and environmental performance requirements.

What pressure and temperature levels can these connectors withstand?

Depending on the design, connectors can operate from -55°C to +200°C (up to +260°C for specialized versions) and withstand pressure differentials up to 10,000 PSI.