Engineered For Leak-Free Performance
Our sealing rings are built to deliver a consistent, conforming seal between threaded or flanged components across hydraulics, pneumatics, fuel, and coolant lines. Each ring is manufactured to tight tolerances so it seats cleanly, fills micro-gaps, and resists creep, making installations faster and maintenance intervals longer.
Choose from copper for excellent thermal conductivity and chemical resistance, aluminum for lightweight corrosion performance, or specialty alloys when media or temperature demands increase. Our catalog covers common metric and inch sizes, so matching threads, ports, and banjo fittings is simple during assembly or replacement. Every ring is produced for dimensional accuracy and surface finish quality, ensuring it beds in smoothly and holds torque without galling surrounding components.
To round out a complete connection solution, pair your setup with our Conical Spring Washer to maintain preload under thermal cycling, our Finishing Washer for a clean, professional bearing surface, and our Fender Washers to distribute load on softer materials without deforming the joint.
Our DIN 7603 sealing rings follow the widely trusted standard that specifies soft-metal rings used in fluid systems to create a tight seal between mating components. Available in copper, aluminum, and other soft alloys, these rings deform predictably under torque to fill imperfections at the interface, preventing weeping at low torque and blow-by under pressure. The result is a stable, repeatable seal that suits service work, OEM builds, and high-duty applications where reliability matters every cycle.
Best Practices for Installing Sealing Rings
Proper sealing starts with clean, flat, burr-free mating surfaces and the correct ring size. Position the ring squarely, apply the recommended torque for your fitting, and allow the soft metal to compress evenly—over-tightening can damage threads or crush the ring beyond its ideal deformation range.
For service work, replace rings rather than reusing them; fresh material provides the most reliable compression and helps maintain torque values, even in demanding temperature swings and vibration.
FAQs
What is a sealing ring used for?
A sealing ring creates a pressure-tight barrier between two mating components, such as a fitting and a port, by compressing to fill microscopic irregularities. It prevents leaks in systems carrying fluids or gases, stabilizes pressure, and protects adjacent parts from contamination.
How to install a sealing ring?
Clean the contact faces, verify the correct size, then place the ring centered between the components. Tighten to the specified torque so the soft metal deforms uniformly and establishes a full-face seal. Avoid reusing compressed rings, and recheck torque after initial heat cycles if the application is highly dynamic.
What is a seal ring also known as?
A sealing ring is also commonly called a crush washer, soft-metal washer, or sealing washer, especially in automotive, hydraulic, and pneumatic contexts.
What is the difference between a sealing ring and a gasket?
A sealing ring is typically a soft-metal washer that seals at a localized interface around fittings and fasteners through controlled compression. A gasket is usually a broader profile made from materials like elastomers, fiber, or metal composites that seals larger flange faces or housings. Rings target point connections; gaskets cover wider mating surfaces.
