O-ring 18x4 NBR 70 ShA

Construction and design

O-ring 18x4 NBR 70 ShA is a nitrile rubber sealing ring designed to provide reliable sealing in industrial hydraulic, pneumatic and mechanical systems. This NBR O-ring belongs to the widely used category of O-rings NBR 70 ShA nitrile rubber sealing rings used in machinery, automotive systems and industrial equipment.

The design is based on a classic circular elastomer cross section which ensures uniform compression and dependable sealing in static and lightly dynamic applications. The nitrile rubber compound NBR provides resistance to mineral oils, lubricants and many industrial fluids commonly present in production machinery and service equipment.

O-ring 18x4 NBR 70 ShA nitrile rubber sealing ring is frequently used in machines where dimensional accuracy and sealing reliability are essential. The 18x4 mm size corresponds to an inner diameter of 18 mm and a cross section thickness of 4 mm, making it compatible with a wide range of standard groove geometries used in hydraulic components and industrial fittings.

This nitrile rubber sealing ring is commonly searched under long tail technical phrases such as O-ring 18x4 NBR, O-ring 18x4 70 ShA nitrile, industrial O-ring 18x4 mm, nitrile rubber sealing ring 18x4 and O-ring 18x4 pack of 100.

Industrial applications

Within the category of O-rings NBR 70 ShA nitrile rubber sealing rings, the 18x4 model is frequently used in fluid handling systems, pumps, valves, compressors and hydraulic assemblies. Industrial maintenance teams often rely on this size during routine servicing of machinery and equipment where standard nitrile O-rings are required.

Typical applications include hydraulic valve assemblies, pneumatic connectors, machine tool components, automotive service equipment and industrial pumps. The nitrile rubber material ensures dependable performance in environments where lubricating oils and mechanical fluids are present.

Because the product is supplied in a pack of 100 pieces, it is particularly suitable for industrial maintenance departments, repair workshops, technical distributors and production facilities that require consistent access to standard sealing components.

Operational advantages

One of the main advantages of the O-ring 18x4 NBR 70 ShA nitrile rubber sealing ring is its versatility in industrial applications. NBR O-rings offer a practical balance between durability, elasticity and cost efficiency, which makes them one of the most widely used sealing solutions in mechanical engineering.

The 70 ShA hardness provides sufficient elasticity to ensure proper compression in sealing grooves while maintaining structural stability during operation. This balance allows the sealing ring to function reliably in many typical industrial sealing conditions.

Using a pack of 100 units improves inventory efficiency for B2B customers. Industrial buyers and maintenance teams benefit from standardized packaging which simplifies storage and ensures quick replacement availability during equipment servicing.

Dimensional compatibility

The designation O-ring 18x4 refers to the inner diameter of 18 mm and the cross section thickness of 4 mm. This dimensional format is widely used in industrial sealing grooves designed for standard nitrile rubber sealing rings.

Correct O-ring selection should consider groove dimensions, compression ratio, working pressure and compatibility with the operating fluid. In many machines and industrial assemblies the 18x4 NBR 70 ShA sealing ring provides an effective solution for preventing leakage and maintaining system integrity.

Because the dimension 18x4 is a common industrial standard, this nitrile rubber sealing ring can be used as a replacement part in numerous hydraulic and mechanical components across different industries.

Technical specification

Type: O-ring
Product type: nitrile rubber sealing ring
Material: NBR nitrile rubber
Hardness: 70 ShA
Inner diameter: 18 mm
Cross section thickness: 4 mm
Size designation: 18x4
Packaging: pack of 100
Application: industrial sealing systems, hydraulics, pneumatics
Function: sealing of mechanical and fluid system components

FAQ

What is an O-ring 18x4 NBR 70 ShA used for
It is used as a nitrile rubber sealing ring in hydraulic systems, pneumatic equipment, pumps, valves and industrial machinery components.

Is nitrile rubber suitable for industrial sealing
Yes. NBR nitrile rubber is widely used because it offers good resistance to oils, lubricants and many technical fluids found in industrial environments.

What does the 70 ShA hardness mean
70 ShA indicates the hardness of the rubber compound and represents a balanced level of elasticity and durability suitable for many industrial sealing applications.

Why is the product supplied in packs of 100
Industrial customers often require multiple identical sealing rings for maintenance and servicing. Packaged quantities simplify storage and inventory management.

Can this O-ring be used in hydraulic equipment
Yes. O-ring 18x4 NBR 70 ShA is commonly used in hydraulic connectors, valves and industrial fluid systems where nitrile rubber sealing rings are required.