O-ring 70x5 NBR 70 ShA

Key Specifications & Applications

The O-ring 70x5 NBR 70 ShA is a metric O-ring made of nitrile rubber (NBR) with a hardness of 70 Shore A, having an internal diameter (ID) of 70 mm and a cross-sectional thickness (CS) of 5 mm.

This size and material combination is widely used in industrial, hydraulic, lubrication, fluid and fuel systems. It is suited for static and mild dynamic sealing in pumps, valves, hydraulic cylinders, gearboxes, fuel systems, flanges, housings, and other mechanical assemblies requiring a robust oil-resistant seal.

Nitrile rubber (NBR) provides excellent resistance to oils, greases, fuel, and many non-polar fluids. Typical operating temperature range is approximately -30 °C to +100 °C (depending on exact formulation, environmental conditions, and dynamic loads). In many catalogues, NBR O-rings in similar hardness are rated in that range.

This O-ring is often listed in metric O-ring inventories and industrial seal catalogs, and customers search using phrases like “O-ring 70x5”, “70x5 NBR O-ring”, “NBR 70 ShA seal”, “oil resistant O-ring 70x5 mm”, “metric O-ring 70 by 5”, and “industrial O-ring 70x5 NBR”.

Benefits & Technical Highlights

• Excellent oil and fuel resistance thanks to NBR compound

• Balanced hardness (70 ShA) combining elasticity with structural strength

• Precise dimensions (70 x 5 mm) for tight fit in standard metric grooves

• Reliable static sealing and potential for mild dynamic use

• Cost-effective component ideal for bulk B2B purchases

• Compatibility with industry systems — many machines and assemblies accept metric NBR rings

• Minimized leakage and extended component life when properly installed

By weaving in user search terms such as “O-ring 70x5”, “NBR 70 ShA O-ring”, “oil resistant O-ring 70 mm”, “metric seal 70x5 NBR”, and “industrial O-ring 70x5 mm”, this description aims to capture different search intents.

FAQ

Q1: Will the O-ring 70x5 NBR 70 ShA fit my application?
A1: Check your internal diameter (should be ~70 mm) and the groove or gap cross-section (should be ~5 mm). If they match, this O-ring is appropriate.

Q2: Can it resist oil, grease, and fuel?
A2: Yes. NBR (nitrile rubber) is known for good resistance to oils, greases, and many fuel types, making it suitable for lubrication and fuel systems.

Q3: What is its temperature working range?
A3: Typically from -30 °C up to +100 °C in continuous use. In favorable conditions and with suitable formulation, it may handle short excursions above +100 °C.

Q4: Can it be used for dynamic sealing (moving parts)?
A4: This O-ring is best for static sealing. In applications with mild relative motion (e.g. slight reciprocation, low-speed shafts), it may perform acceptably if the contact surfaces, lubrication, and speed are appropriate.

Q5: When will I receive it if I order today?
A5: The product is stocked at Warehouse & Store: Lublin, ul. Smoluchowskiego 1, building 4. 🚚 24h shipping - fast and efficient order processing ensures prompt delivery in many regions.

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