Mil-Spec Type Sensor Seal

Trust Hermetic Seal Technology to deliver Mil-Spec Type Sensor Seals that not only meet but exceed your expectations for military and federal compliance. Contact us today to discuss your requirements and experience the difference with HST’s precision-engineered seals!

Mil-Spec Type Sensor Seal

At Hermetic Seal Technology (HST), we lead the way in manufacturing custom hermetic glass-to-metal seals, specializing in the production of mil-spec type sensor seals that meet the rigorous requirements of federal and military standards. Our expertise allows us to manufacture hermetic connectors that not only comply with performance and design specifications but also offer customization options tailored to your exact needs.

Here’s why HST’s Mil-Spec Type Sensor Seals stand out:

  1. Comprehensive Customization: With a diverse range of options available, we offer customization in coupling types including Bayonet, Push or Pull, Quick Connect, Threaded, and Custom Coupling Connection. This ensures that our seals seamlessly integrate into your specific application requirements.
  2. Industry Coverage: In addition to military and federal applications, we cater to various industries such as aerospace, automotive, electronics, healthcare, medical, and oil exploration. Our seals are versatile and adaptable to a wide range of environments and applications.
  3. Specialized Sensor Feedthroughs: Our expertise extends to custom-manufacturing sensor feedthroughs tailored for a multitude of applications, including connector systems for renewable energy, hermetic sensors & accelerometers, military communication equipment, power circuit and electrical control applications in rockers, space vehicles, missiles, and traffic collision avoidance systems.
  4. ISO Compliance: HST is ISO compliant, ensuring that our manufacturing processes adhere to international standards, guaranteeing quality, reliability, and consistency across all our products.

Production Capability

We have the ability to handle orders from ten parts to millions of parts.

We can also do sample parts.


  • Connector Systems for Renewable Energy Systems
  • Connectors for Hermetic Sensors & Accelerometers
  • Military Communication Equipment
  • Power Circuit and Electrical Control Applications in Rockets, Space Vehicles, and Missiles
  • Traffic Collision Avoidance Systems


Glass for our hermetic connectors is determined by the requirements of the customers specifications. All standard glasses can be utilized.

  • Plated Mild Steel
  • Stainless Steel
  • And Others


  • 52 Alloy
  • Inconel
  • Stainless Steel
  • Other Materials Available on Request


  • Flat and Pierce Pins (Eyelet)
  • PCB Pins
  • Solder Cup Pins
  • Straight Pins


  • 16 AWG to 4 AWG
  • Custom Pin Sizing


  • Jam Nut
  • Square
  • Weld or Solder


  • Circular
  • Rectangular

Size (Diameter)

0.25” to 3.0”

  • Bayonet
  • Custom Coupling Connection
  • Push or Pull
  • Quick Connect
  • Threaded
  • Brazing
  • Glass Formulation
  • Glass Sealing
  • Resistance Welding
  • Hermeticity Testing (100 % leak tests are performed on all seals)
  • Hypot (High Voltage) Testing / Breakdown Voltage
  • Insulation Resistance Testing (Isolation)
  • Electrochemical Corrosion Testing
  • Glass Smelting
  • Laser Welding
  • Machining
  • Plating
  • Salt Spray Corrosion Testing
  • Stamping

1 x 10^8 cc/sec helium leak rate (100% Tested)

All HST seals are 100% leak tested to ensure quality and performance

  • Copper Plating
  • Electroless Ni Plating
  • Electrolytic Ni Plating
  • Hard Gold Plating
  • Pure Gold Plating
  • Silver Plating
  • Tin Plating
  • And Many Others

Industries Served







Oil Exploration

Companies Using HST Seals

Quality Control

Contact Hermetic Seal Technology Today

Experience precision with HST’s Mil-Spec Type Sensor Seals. Engineered to meet federal and military standards, our customizable hermetic connectors seamlessly integrate into diverse applications. From aerospace to healthcare, trust our ISO-compliant solutions for reliability and performance. Contact us today!