Aerospace & Defense


At Hy-Lok UK, we provide customers in the aerospace and defense industries with a wide range of fittings and valves, designed to meet the most stringent requirements.

The aerospace and defense industry involves a number of critical areas such as aircraft, ground vehicles, radar systems, and transportation and safety management. All equipment and components used in the aerospace and defense industry require strict adherence to highly specialized military and defense standards.

Our product offerings include tube and pipe fittings to a number of precision valves, hoses and inline filters. Our valves and fittings are constructed from materials such as carbon steel, stainless, steel and brass, and engineered with robust features and advanced designs. These products are well suited for the extreme conditions that defense and aerospace applications encounter.

Aerospace and Defense Hy-Lok products are used on a wide range of applications, from high pressure fluid transfer applications and critical life support systems, to analytical instrumentation, vehicles and troop delivery systems. All of the products that we provide meet some of the strictest industry standards, offering our customers the highest quality available.

As the UK master distributor for the Hy-Lok Corporation, a global industry leader in the manufacture of valve and fitting solutions, Hy-Lok UK, Inc. can connect you to the components and parts that meet the precise requirements of your application. Our product lines contain high-quality equipment, priced at a competitive level, to offer you the best valve and fitting solutions for every project.

To learn more about all of our products, or why Hy-Lok is a preferred choice for leak tight reliable fittings and valves, see the table below or find a Hy-Lok distributor in your area.



  • Aerospace
  • US Navy
  • Defense
  • Military


  • Critical Life Support Systems
  • Fluid Transfer
  • Defense Systems
  • Vehicles
  • Troop Delivery Systems
  • Analytical Instrumentation


  • Tube Fittings
  • Pipe Fittings
  • Ball Valves
  • Needle Valves
  • Inline Filters
  • Check Valves
  • Relief Valves
  • Plug Valves
  • Hoses


  • Hy-Lok


  • Stainless Steel
  • Brass
  • Carbon Steel

Industry Focus

  • Compressed Natural Gas
  • Liquefied Natural Gas
  • Oil & Gas Refining, Production, & Exploration
  • Power Generation
  • Chemical Processing
  • Semiconductor Manufacturing
  • Pulp & Paper
  • Analytical Instrumentation
  • Research Labs
  • Life Support
  • Pharmaceutical & Biotechnology
  • Aerospace & Defense
  • Cryogenics
  • Rigs, Platforms & Shipbuilding

Industry Standards

  • ISO 9001
  • ASME QSC-584
  • API Q1-6D
  • PVD 97/23/EC
  • ISO 14001
  • OHSAS 18001
  • Firesafe API 607, 6FA, BS6755

Additional Resources

Fluid Compatibility Guide

Product Catalogues

Certification Library