O-Ring 98 x 5,5 mm NBR 90 ShA

Applications

The metric O-Ring 98 x 5,5 mm, manufactured from nitrile-butadiene rubber (NBR) with a hardness rating of 90 ShA, is designed for high-performance industrial applications. As a precision rubber gasket and industrial sealing ring, it provides reliable sealing in static and light dynamic conditions across hydraulic cylinders, pneumatic valves, flange joints and machine assemblies. Selected for use in demanding environments where industrial sealing and high durability are required, this O-ring is ideal for systems with oil, grease or general fluid media. With its 98 mm inner diameter and 5.5 mm cross-section, it suits larger bore glands and ensures compatibility with European metric standards.

For procurement teams and engineers working in sectors such as manufacturing, processing, fluid power and heavy equipment service—this O-ring offers a robust component for sealing to hydraulics and pneumatics, ensuring fewer failures and longer maintenance cycles. Its formulation and dimensions are well-suited for industrial OEM installations, retrofit applications and preventive maintenance programs.

Advantages

• High resistance with 90 ShA hardness: The NBR 90 ShA compound offers increased wear resistance, extrusion resistance and improved lifetime under higher pressures compared to softer elastomers. This supports long-term performance in demanding conditions.

• Optimised for industrial sealing: Designed for applications in hydraulics and pneumatics, this ring meets the needs of servicing and production environments that require repeatable, dependable sealing components.

• Large metric size (98 x 5.5 mm): The non-standard dimension allows use in applications where larger diameter seals are needed but custom solutions would otherwise be required—enhancing flexibility and reducing cost.

• Suitable rubber gasket for fluid media: NBR is widely recognised for compatibility with mineral oils, light greases and general industrial fluids, making this O-ring a practical choice for systems where chemical resistance and sealing reliability matter.

• Availability & fast dispatch: Hosted at our warehouse in Lublin (ul. Smoluchowskiego 1, building 4), offering 24 h dispatch for B2B customers—supporting maintenance operations and production uptime.

Technical Data

• Product type: O-Ring / Industrial Sealing Ring

• Dimensions: Inner Diameter (ID) 98 mm; Cross-Section (CS) 5.5 mm

• Material: NBR (Nitrile Butadiene Rubber)

• Hardness: 90 Shore A

• Typical use: Static or light dynamic sealing in hydraulic & pneumatic systems, industrial equipment

• Indicative temperature range: approx. -30 °C to +100 °C/120 °C (depends on media and conditions)

• Colour: Black

• Warehouse & Store: Lublin, ul. Smoluchowskiego 1, building 4

• Delivery: 24 h for B2B orders

FAQ

Q1: What does a hardness of 90 ShA mean for this O-Ring?
A: 90 ShA indicates a relatively firm elastomer—this hardness level improves resistance to deformation, extrusion and wear in high-pressure sealing environments, making the seal more durable in industrial applications.

Q2: Is this NBR 90 ShA suitable for hydraulic oil, greases or pneumatic fluids?
A: Yes. NBR is a commonly used elastomer for rubber gaskets and sealing rings in hydraulics and pneumatics due to its good compatibility with mineral oils and greases, and general industrial fluid media.

Q3: Can this O-Ring be used in dynamic sealing applications with movement?
A: This product is designed primarily for static sealing or light motion. For high-speed or heavy dynamic motion (e.g. reciprocating shafts), the gland design and material selection should be assessed carefully.

Q4: How do I ensure the correct fit for a 98 x 5.5 mm O-Ring?
A: Ensure your groove inner diameter corresponds to 98 mm and that the cross-section is compatible with 5.5 mm thickness. Proper squeeze (compression) and correct mounting lead to optimal sealing performance and reduced leakage.

Q5: How quickly can I receive this product and is it available in stock?
A: Yes—this O-Ring is held in stock at our warehouse in Lublin (ul. Smoluchowskiego 1, building 4). We provide 24 h delivery for B2B customers, supporting rapid deployment and maintenance operations.