NBR 70 O-Ring 5x2.5 mm

Product Overview

The 5x2.5 mm NBR 70 O-Ring is a premium-quality sealing ring manufactured from Nitrile Butadiene Rubber (NBR) with a hardness of 70 Shore A. It is designed to provide reliable sealing in both static and dynamic applications while offering excellent resistance to mineral oils, greases, hydraulic fluids and compressed air.

This version is supplied in a bulk pack of 1000 pieces, specifically intended for manufacturers, industrial maintenance departments, OEM production, service companies, distributors and wholesalers. Unlike standard retail packs of 50 or 100 pieces, this industrial package significantly reduces the cost per seal and minimizes purchasing frequency.

With an inside diameter of 5 mm and a 2.5 mm cross-section, these O-rings are widely used in hydraulic systems, pneumatic equipment, pumps, valves, compressors, automation systems and industrial machinery where reliable sealing performance is essential.

Technical Specifications

Why Choose the 1000-Piece Bulk Pack?

The 1000-piece industrial package offers:

• Lower cost per O-ring
• Ideal for high-volume production
• Reduced purchasing frequency
• Improved inventory management
• Perfect for industrial maintenance departments
• Excellent choice for OEM manufacturers
• Suitable for wholesalers and distributors
• Ready for continuous production environments
• Professional industrial packaging
• Cost-effective long-term supply

Typical Applications

The 5x2.5 mm NBR O-Ring is commonly used in:

• Hydraulic systems
• Pneumatic equipment
• Hydraulic cylinders
• Pneumatic cylinders
• Pumps
• Valves
• Compressors
• Industrial automation
• Automotive components
• Agricultural machinery
• Manufacturing equipment
• OEM production
• Maintenance, Repair and Operations (MRO)

Material Properties – NBR 70 Shore A

NBR (Nitrile Butadiene Rubber) provides:

• Excellent resistance to mineral oils
• High resistance to greases
• Good resistance to hydraulic fluids
• Excellent wear resistance
• Good mechanical strength
• Long service life
• Reliable sealing performance
• Outstanding value for industrial applications

Why Choose NBR O-Rings?

NBR remains one of the world's most widely used sealing materials because it combines:

• Excellent oil resistance
• Long operational life
• High flexibility
• Reliable sealing performance
• Easy installation
• Cost-effective operation
• Proven industrial reliability

Frequently Asked Questions (FAQ)

What are the O-ring dimensions?

The O-ring measures 5 mm inside diameter × 2.5 mm cross-section.

How many O-rings are included?

Each package contains 1000 pieces, making it ideal for industrial and wholesale applications.

What does NBR 70 mean?

It indicates that the O-ring is manufactured from Nitrile Butadiene Rubber with a hardness of 70 Shore A.

What media is NBR resistant to?

NBR offers excellent resistance to mineral oils, greases, hydraulic fluids, water and compressed air.

Who is this bulk pack intended for?

It is designed for manufacturers, industrial plants, OEM production, maintenance departments, distributors, wholesalers and service companies with high-volume sealing requirements.

Frequently Asked Questions from Engineers

Why purchase O-rings in bulk?

Bulk packaging lowers the unit cost, simplifies inventory management and ensures continuous availability for production and maintenance operations.

What are the most common causes of O-ring failure?

• Incorrect sizing
• Improper installation
• Twisting during assembly
• Chemical incompatibility
• Excessive pressure
• High operating temperatures
• Mechanical damage

How can O-ring service life be extended?

Use the correct groove dimensions, lubricate the O-ring before installation, avoid twisting during assembly and always select the proper elastomer for the operating environment.