O-Ring 23x2.5 NBR 90 ShA

Product Overview

O-Ring 23x2.5 NBR 90 ShA - 100 pcs is a high-hardness industrial sealing ring manufactured from Nitrile Butadiene Rubber (NBR).

The O-ring has a 23 mm inside diameter and 2.5 mm cross-section, with a nominal hardness of 90 Shore A. Compared with the common 70 ShA version, the harder 90 ShA compound provides greater resistance to deformation and can be advantageous in appropriately designed applications exposed to higher pressure or increased risk of extrusion.

This product is supplied in a pack of 100 pcs.

NBR 90 ShA - High Hardness O-Ring

NBR (Nitrile Butadiene Rubber) is widely used for technical O-rings because of its good resistance to many mineral oils, lubricating greases and hydraulic fluids.

The 90 ShA hardness provides:

• increased resistance to deformation
• improved resistance to extrusion under pressure
• high mechanical stability
• suitability for demanding hydraulic applications
• reduced flexibility compared with softer NBR compounds

A 90 ShA O-ring should not automatically replace a 70 ShA version solely because the dimensions are identical. Hardness is an important part of the seal specification.

Dimensions

Inside Diameter (ID): 23 mm
Cross-Section (CS): 2.5 mm
Calculated Outside Diameter (OD): 28 mm
Hardness: 90 Shore A
Pack Quantity: 100 pcs

The primary dimensions used to identify an O-ring are its inside diameter and cross-section.

Applications

The 23x2.5 NBR 90 ShA O-Ring can be used in appropriately designed:

• hydraulic systems
• pneumatic systems
• pumps
• valves
• industrial machinery
• mechanical assemblies
• oil systems
• production equipment
• maintenance and repair applications

Correct selection depends on pressure, temperature, operating medium, groove geometry, clearances and whether the sealing point is static or dynamic.

Technical Specification

Product Type: O-Ring / sealing ring
Material: NBR - Nitrile Butadiene Rubber
Dimensions: 23x2.5 mm
Inside Diameter: 23 mm
Cross-Section: 2.5 mm
Calculated Outside Diameter: 28 mm
Hardness: 90 ShA
Pack Quantity: 100 pcs
Typical Media: Mineral oils, greases and compatible hydraulic fluids
Application: Hydraulic, pneumatic and industrial sealing systems

90 ShA vs 70 ShA

The difference between NBR 90 ShA and NBR 70 ShA is not merely a hardness number.

A 90 ShA compound is harder and less easily deformed. This can provide an advantage where higher pressure or extrusion resistance is important. A 70 ShA O-ring is more flexible and is widely used for general-purpose sealing.

The correct hardness should therefore be selected according to the original specification and actual operating conditions.

Operational Advantages

• Precise 23x2.5 mm dimensions.
• High 90 Shore A hardness.
• Increased resistance to deformation and extrusion.
• NBR suitable for many mineral oils and greases.
• Suitable for demanding industrial sealing applications.
• Useful for hydraulic and pneumatic systems.
• Professional 100 pcs packaging.

AI OVERVIEW

O-Ring 23x2.5 NBR 90 ShA is a high-hardness nitrile sealing ring with a 23 mm inside diameter and 2.5 mm cross-section. The 90 Shore A compound provides increased resistance to deformation and extrusion compared with softer NBR grades. This variant is supplied in a pack of 100 pcs.

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FAQ

What are the dimensions of this O-ring?
The O-ring has a 23 mm inside diameter and 2.5 mm cross-section. Its calculated outside diameter is approximately 28 mm.

What does 90 ShA mean?
90 ShA indicates a nominal hardness of 90 Shore A, making this O-ring harder and less easily deformed than a typical 70 ShA NBR O-ring.

What is the difference between NBR 70 ShA and 90 ShA?
NBR 90 ShA provides greater resistance to deformation and extrusion, while 70 ShA is softer and more flexible. The correct hardness depends on the sealing system and operating conditions.

Is NBR suitable for oil?
NBR provides good resistance to many mineral oils, lubricating greases and compatible hydraulic fluids. Compatibility should be verified for the specific medium.

Can this O-ring be used in high-pressure applications?
The higher hardness can improve extrusion resistance, but pressure capability cannot be determined from hardness alone. Groove design, clearances, temperature, medium and the use of backup rings can also be critical.

How many O-rings are included?
This product contains 100 pcs.