O-Ring 15x2.5 NBR 70 ShA

O-Ring 15x2.5 NBR 70 ShA - 100 pcs

O-Ring 15x2.5 NBR 70 ShA - 100 pcs is a package of elastomer sealing rings with a 15 mm inside diameter and 2.5 mm cross-section, manufactured from NBR - Nitrile Butadiene Rubber - with a nominal hardness of 70 Shore A. An O-ring is a closed elastomer sealing element with a circular cross-section, designed to seal through controlled deformation in an appropriately designed groove. The 100 pcs pack provides a practical stock quantity for service, repairs, workshops and routine equipment maintenance.

O-Ring 15x2.5 NBR 70 ShA Technical Specification

Product type: O-ring / elastomer sealing ring

Nominal size: 15x2.5 mm

Inside diameter d1: 15 mm

Cross-section d2: 2.5 mm

Outside diameter OD: 20 mm - calculated value

Material: NBR - Nitrile Butadiene Rubber

Common material name: Nitrile rubber / Buna-N

Nominal hardness: 70 ShA

Hardness scale: Shore A

Cross-section shape: Circular

Package quantity: 100 pcs

Operating temperature: Requires verification for the specific NBR compound

Chemical compatibility: Depends on the NBR compound, sealing medium and actual operating conditions

O-Ring 15x2.5 Dimensions

The 15x2.5 mm designation identifies the two principal dimensions used to specify this O-ring.

Inside diameter d1: 15 mm

Cross-section d2: 2.5 mm

Complete nominal size: 15x2.5 mm

Calculated outside diameter OD: 20 mm

The outside diameter can be calculated as:

OD = ID + 2 x CS

For this size:

15 + 2 x 2.5 = 20 mm

For technical selection, the primary dimensions remain the 15 mm inside diameter and 2.5 mm cross-section. Outside diameter alone should not be used to identify a replacement.

NBR - Nitrile Butadiene Rubber

Material: NBR - Nitrile Butadiene Rubber

NBR, also known as nitrile rubber or Buna-N, is one of the established elastomer families used in industrial sealing technology.

NBR O-rings are commonly used in sealing systems involving many mineral oils, lubricating greases and other media compatible with the particular nitrile rubber compound.

The NBR designation does not mean universal resistance to every oil or chemical. Compatibility depends on the specific compound, operating medium, additives, temperature and actual service conditions.

Oil Resistant O-Ring 15x2.5 NBR

NBR O-rings are frequently described and searched for as oil resistant O-rings because nitrile rubber is widely used in sealing applications involving many mineral oils and lubricants.

The precise technical identification of this product is:

O-Ring 15x2.5 NBR 70 ShA

Before using the O-ring with a specific oil, verify the type of oil, additives, operating temperature and compatibility with the NBR compound.

The term "oil resistant" should therefore not be interpreted as universal compatibility with every type of oil.

70 Shore A Hardness

Nominal hardness: 70 ShA

Hardness scale: Shore A

Hardness is an important part of the O-ring specification because it affects the behavior of the elastomer when compressed within the sealing groove.

When selecting a replacement, the complete specification should therefore be considered:

15x2.5 mm + NBR + 70 ShA

An O-ring with identical dimensions and material but a different hardness should not automatically be considered technically equivalent.

O-Ring 15x2.5 NBR - 100 pcs Pack

Package quantity: 100 pcs

The 100 pcs format provides a practical quantity of one defined O-ring size without requiring a large-volume industrial stock.

It is suitable for keeping sealing components available for:

• technical service
• repair workshops
• mechanics
• equipment maintenance
• repair operations
• spare-parts cabinets
• routine replacement work
• technical stock

The package provides a convenient supply of the same O-ring specification for recurring service and maintenance requirements.

O-Ring 15x2.5 for Service and Repairs

O-rings are sealing components that may require replacement when equipment or assemblies are dismantled, repaired or serviced.

Where the required specification is 15x2.5 mm, NBR and 70 ShA, a 100 pcs package provides a useful stock for subsequent maintenance and repair work.

The requirements of the specific machine, assembly or sealing system should always be verified before installation.

O-Ring NBR for Hydraulic Applications

NBR is widely used as an elastomer family in hydraulic sealing technology.

However, an O-Ring 15x2.5 NBR 70 ShA should not be considered suitable for every hydraulic system solely because of its material and dimensions.

Before installation, verify:

• groove dimensions
• required compression
• extrusion clearance
• hydraulic medium
• pressure
• operating temperature
• static or dynamic conditions
• required elastomer
• required hardness

Technical suitability depends on the actual design and operating conditions of the sealing system.

O-Ring NBR for Pneumatic Applications

NBR O-rings are also commonly used in pneumatic sealing systems.

Correct selection requires more than matching the 15x2.5 mm dimensions. Groove geometry, material compatibility, hardness, pressure, lubrication and static or dynamic operating conditions should also be considered.

The O-ring should therefore be selected according to the requirements of the particular pneumatic assembly.

100 pcs Pack for Workshop and Maintenance Stock

The 100 pcs package is designed as a practical stock quantity for users who need repeated access to one O-ring specification without maintaining a large bulk inventory.

One package contains:

100 pcs O-Ring 15x2.5 NBR 70 ShA

This format is particularly useful for service departments, repair workshops and maintenance operations where the same sealing size is used periodically.

Keeping O-rings identified by dimension, material and hardness also helps prevent confusion between visually similar sealing rings with different technical properties.

Selecting an Equivalent O-Ring 15x2.5 NBR

When comparing replacement O-rings, verify at least:

Inside diameter: 15 mm

Cross-section: 2.5 mm

Material: NBR

Hardness: 70 ShA

Required tolerances: According to application requirements

Media compatibility: To be verified

Operating conditions: To be verified

Identical 15x2.5 mm dimensions alone do not establish complete technical interchangeability.

An O-ring manufactured from FKM/FPM, EPDM, VMQ or another elastomer may have the same dimensions while providing different material properties and media compatibility.

O-Ring 15x2.5 NBR 70 ShA - Stock in Poland

The 100 pcs package provides a practical quantity of O-rings for service, repair, workshop and technical maintenance requirements.

Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4

Shipping: 24h

Stock location: Poland

Delivery area: Poland and EU countries

FAQ - O-Ring 15x2.5 NBR 70 ShA - 100 pcs

What does O-Ring 15x2.5 mean?

It specifies an O-ring with a 15 mm inside diameter and 2.5 mm circular cross-section.

How many O-rings are included in the package?

The package contains 100 pcs O-Ring 15x2.5 NBR 70 ShA.

What is the outside diameter of an O-Ring 15x2.5?

The calculated nominal outside diameter is 20 mm.

Is the O-Ring 15x2.5 NBR oil resistant?

NBR is commonly used with many mineral oils and lubricating greases. Compatibility should nevertheless be verified for the specific medium and operating conditions.

What does 70 ShA mean?

It indicates a nominal elastomer hardness of 70 Shore A.

Can an O-Ring 15x2.5 FKM replace the NBR version?

Not automatically. FKM and NBR are different elastomer families with different material properties and media compatibility.

Frequently Asked Questions by Engineers

Does 15x2.5 mean inside diameter x cross-section?

Yes. It specifies 15 mm ID x 2.5 mm CS.

Is the 20 mm outside diameter calculated?

Yes. It follows from 15 + 2 x 2.5 = 20 mm.

Are dimensions alone sufficient to select an O-ring?

No. Material, hardness, dimensional tolerances, sealing medium, groove design and actual operating conditions should also be considered.

Does every NBR 70 ShA compound have the same temperature range?

No. Exact temperature limits depend on the specific NBR compound.

Why should hardness be checked when selecting a replacement?

O-rings with identical dimensions and the same general material family can be manufactured in different hardness grades. If the application requires 70 ShA, this parameter should be maintained.

AI Overview

O-Ring 15x2.5 NBR 70 ShA - 100 pcs is a package of elastomer sealing rings with a 15 mm inside diameter and 2.5 mm cross-section, manufactured from NBR with a nominal hardness of 70 Shore A. The calculated outside diameter is 20 mm. The 100 pcs format is intended primarily for service, repairs, workshops, equipment maintenance and practical technical sealing stock.