O-Ring NBR 70 ShA 4.3x2.4 mm - Oil Resistant Rubber Seal

What is the NBR O-Ring 4.3x2.4 mm 70 ShA (100 pcs)?

The NBR O-Ring 4.3x2.4 mm 70 ShA is a precision sealing ring manufactured from NBR (Buna-N nitrile rubber) for static and dynamic sealing applications. This 100-piece pack is intended for maintenance technicians, repair workshops, machine servicing and technical departments requiring a practical quantity of replacement seals. The standard 70 Shore A hardness provides an excellent combination of flexibility, sealing efficiency and resistance to wear in oil and grease environments.

Designed for Workshop and Service Applications

The 4.3x2.4 mm O-ring is commonly used in:

• Hydraulic components
• Pneumatic equipment
• Control valves
• Pumps
• Industrial machinery
• Agricultural equipment
• Mechanical assemblies
• Machine servicing
• Repair workshops
• Preventive maintenance

Its compact dimensions make it suitable for sealing precision mechanical and fluid handling components.

Benefits of the 100-Piece Pack

The 100-piece package is an ideal choice for:

• Automotive workshops
• Industrial maintenance teams
• Hydraulic service companies
• Mechanical repair shops
• Machine service technicians
• Small production batches
• Regular repair work

The package provides a convenient quantity of frequently used sealing rings while simplifying inventory management.

Technical Specifications

Material:

NBR (Buna-N Nitrile Rubber)

Hardness:

70 Shore A

Inside Diameter:

4.3 mm

Cross Section:

2.4 mm

Color:

Black

Operating Temperature:

Approximately -30°C to +100°C

Chemical Resistance:

• Mineral oils
• Lubricating greases
• Hydraulic fluids
• Gear oils
• Fuels
• Aliphatic hydrocarbons

Package Quantity:

100 pieces

Why Choose NBR 70 ShA?

NBR is one of the most widely used elastomers for industrial sealing because it provides:

• Excellent resistance to mineral oils
• Good compatibility with greases
• High abrasion resistance
• Stable sealing performance
• Reliable elasticity
• Long service life in hydraulic and pneumatic systems

The 70 Shore A hardness is the standard specification for many industrial sealing applications.

Benefits During Maintenance

Using the correct O-ring helps to:

• Prevent fluid leakage
• Maintain system pressure
• Protect internal components
• Reduce equipment downtime
• Improve operational reliability
• Extend machine service life

Storage Recommendations

For maximum service life, store O-rings:

• In a dry location
• Away from direct sunlight
• Protected from ozone
• At room temperature
• In the original packaging

Proper storage helps preserve the elastomer's physical properties over time.

FAQ

Is the 100-piece pack suitable for workshops?

Yes. It is an excellent quantity for repair shops, maintenance technicians and service departments performing regular equipment maintenance.

Is NBR resistant to hydraulic oil?

Yes. NBR offers excellent compatibility with most mineral-based hydraulic oils and lubricants.

Can this O-ring be used in pneumatic systems?

Yes. It is widely used in pneumatic valves, actuators and industrial air systems.

Are other O-ring sizes available?

Yes. A wide selection of NBR O-rings in different diameters and cross sections is available for various sealing applications.

How do I choose the correct O-ring size?

Measure the groove or shaft diameter together with the required cross section and compare the dimensions with the equipment manufacturer's specifications.

Frequently Asked Questions from Maintenance Technicians

Is 70 Shore A the standard hardness?

Yes. It is the most commonly specified hardness for hydraulic, pneumatic and industrial sealing applications.

Can NBR O-rings be used with grease?

Yes. NBR provides excellent resistance to most mineral-based industrial greases.

Can an O-ring be reused?

Reusing compressed sealing rings is generally not recommended because sealing performance may be reduced.

Is this O-ring suitable for industrial equipment maintenance?

Yes. The 4.3x2.4 mm size is suitable for servicing hydraulic, pneumatic and mechanical equipment requiring compact sealing components.