O-ring NBR 7.3x2.4 mm

Key Specs & Applications

The O-ring 7.3x2.4 NBR 70 ShA is a metric size sealing ring with inner diameter (ID) 7.3 mm and cross-section (CS) 2.4 mm, molded from nitrile rubber (NBR) with hardness 70 Shore A. This model is widely used in hydraulic systems, fuel and oil lines, small pumps, valves, instrumentation, and fluid control assemblies.

This bulk package offers 1000 identical O-rings, ideal for industrial users, OEMs, repair shops, or maintenance facilities. The generous quantity ensures you maintain stock and reduce ordering frequency.

NBR (nitrile) material offers strong resistance to oils, greases, and many non-polar fluids, making this O-ring suitable for engine compartments, lubrication circuits, hydraulic controls, fuel systems, and machinery that require compact, reliable sealing.

Typical operating temperature ranges from -30 °C to +100 °C (with occasional short excursions), depending on pressure, fluid, and dynamic conditions. This hardness (70 ShA) balances flexibility and resilience — enough to provide a tight seal under compression, yet resilient to minor deformation over time.

This size is commonly found in industrial O-ring catalogs under designations such as OR-7.3x2.4 NBR 70, 2.4x7.3 NBR70, metric Buna-N 7.3 x 2.4, or NBR70 O-ring 7.3x2.4 mm. Many suppliers list this size in their metric catalog lines.

Benefits & Technical Highlights

• High oil / fuel resistance owing to NBR compound, ideal for lubrication/hydraulic environments

• Bulk quantity (1000 pcs) ensures cost efficiency and continuous supply

• Precise dimension control (7.3 mm ID x 2.4 mm CS) for consistent, reproducible sealing

• Balanced hardness (70 ShA) delivers both flexibility and durability

• Reliable static sealing and limited dynamic use under mild motion

• Reduced leakage and maintenance downtime when correctly applied

• Wide compatibility with standard metric grooves and machinery

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FAQ

Q1: Will the O-ring 7.3x2.4 NBR 70 ShA fit my groove?
A1: Check that your groove or housing has an internal diameter close to 7.3 mm and depth/gap to accept a 2.4 mm cross-section. If so, this O-ring is appropriate.

Q2: Is it suitable for use with oil, fuel, or hydraulic fluid?
A2: Yes — NBR (nitrile) has good compatibility with mineral oils, greases, and many fuels, making this O-ring a common choice in those systems.

Q3: What temperature range can it handle?
A3: The typical continuous range is -30 °C to +100 °C. Performance depends on fluid, pressure, and dynamic stresses; short bursts beyond this range may be tolerated in some environments.

Q4: Can this O-ring be used under moving conditions (dynamic)?
A4: It is primarily designed for static sealing. In low-speed, low-amplitude applications (vibrations, minor reciprocation) it may perform adequately, but for aggressive dynamic conditions, specialized seals are preferable.

Q5: When will I receive the order if I place it today?
A5: We hold stock at 📍 Warehouse & Store: Lublin, ul. Smoluchowskiego 1, building 4. 🚚 24h shipping - fast and efficient order processing ensures prompt delivery in many regions.