O-Ring 304.17x5.33 NBR

The O-Ring 304.17x5.33 NBR 70 ShA is a high-quality industrial sealing ring designed for reliable operation in demanding hydraulic, pneumatic, and mechanical applications. Manufactured from nitrile-butadiene rubber (NBR) with a hardness of 70 Shore A, it combines flexibility, strength, and exceptional resistance to oils, fuels, and lubricants.

With an inner diameter of 304.17 mm and a cross-section of 5.33 mm, this O-Ring is ideal for sealing large-scale components such as pumps, valves, cylinders, and housings in heavy-duty industrial systems. The robust NBR compound ensures long-term sealing stability even under varying pressures and temperatures, making it a dependable choice for both OEM manufacturing and maintenance operations.

The 70 ShA hardness grade provides the right balance between compression resistance and elasticity, ensuring tight, long-lasting sealing in static and low-dynamic applications. This O-Ring is resistant to mineral oils, greases, petroleum-based fluids, and various industrial lubricants, making it suitable for general-purpose industrial use and maintenance in hydraulic and pneumatic systems.

📍 Warehouse & Store: Lublin, ul. Smoluchowskiego 1, building 4
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Technical Specifications and Material Properties

• Dimensions: 304.17 mm inner diameter x 5.33 mm cross-section

• Material: NBR (Nitrile Butadiene Rubber)

• Hardness: 70 Shore A - standard for oil- and fuel-resistant sealing

• Temperature Range: from approx. -30 °C to +100 °C (short-term up to +120 °C)

• Applications: static or low-dynamic sealing in hydraulic and pneumatic systems

• Chemical Resistance: oils, fuels, greases, hydraulic fluids, petroleum-based media

• Advantages: mechanical strength, durability, dimensional stability

Industrial and Service Applications

The O-Ring 304.17x5.33 NBR 70 ShA is designed for:

• Hydraulic systems: pumps, actuators, valves, and power units

• Pneumatic installations: air compressors, control blocks, and oil-lubricated air circuits

• Industrial machinery: process equipment, rotary units, and sealing interfaces

• Maintenance and repair operations: service kits, spare part replacements, and OEM compatibility

Its oil and fuel resistance makes it an essential sealing element in technical environments where consistent performance and high sealing reliability are required.

Key Advantages for Professionals

• High oil and fuel resistance for long service life

• Excellent elasticity and recovery under pressure

• Durable sealing performance in static and low-movement applications

• Precision manufacturing ensures perfect groove fit and leak prevention

• Available in stock - ideal for maintenance teams and industrial procurement

FAQ - Frequently Asked Questions

1. What do the dimensions 304.17x5.33 mm refer to?
They represent the inner diameter (304.17 mm) and the cross-section (5.33 mm) of the O-Ring, which determine its exact groove compatibility.

2. Is the NBR O-Ring suitable for use with oils and fuels?
Yes. NBR (Nitrile Rubber) provides excellent resistance to mineral oils, greases, and petroleum-based fluids.

3. What is the operating temperature range?
The standard NBR compound works reliably from -30 °C to +100 °C, and up to +120 °C for short durations.

4. Can this O-Ring be used in dynamic sealing applications?
It is primarily designed for static and low-dynamic applications. For high-speed or rotary motion, alternative compounds are recommended.

5. Is the O-Ring 304.17x5.33 NBR 70 ShA available for immediate shipment?
Yes. Available from our warehouse in Lublin, ul. Smoluchowskiego 1, building 4 - with fast 24h delivery.