O-Ring NBR 39x2.5 mm 70 Shore A

Product Overview

O-Ring NBR 39x2.5 mm 70 Shore A - 100 pcs is a bulk pack of industrial sealing rings manufactured from NBR (Nitrile Butadiene Rubber) with a nominal hardness of 70 Shore A.

Each O-ring has an inside diameter of 39 mm and a cross-section of 2.5 mm. NBR is one of the most widely used elastomers for industrial O-rings because of its good resistance to many mineral oils, lubricating greases and compatible technical fluids.

The 100-piece pack is particularly suitable for industrial maintenance, production, machine building, technical service and B2B purchasing.

NBR 70 Shore A Material

NBR (Nitrile Butadiene Rubber) is widely used in industrial sealing systems where resistance to oils and good mechanical properties are required.

Typical properties include:

• good resistance to many mineral oils
• good resistance to lubricating greases
• good mechanical strength
• good wear resistance
• useful elasticity
• broad industrial applicability

Chemical compatibility should always be verified for the specific medium, temperature and operating conditions.

O-Ring 39x2.5 mm Dimensions

The nominal dimensions are:

Inside Diameter: 39 mm
Cross-Section: 2.5 mm
Outside Diameter: Approximately 44 mm
Material: NBR
Hardness: 70 Shore A
Pack Quantity: 100 pcs

The designation 39x2.5 mm refers to the inside diameter and cross-section. Both dimensions should be verified when selecting a replacement seal.

Industrial Applications

NBR 39x2.5 mm O-rings can be used in appropriately designed sealing systems for:

• hydraulic systems
• pneumatic systems
• pumps
• valves
• industrial fittings
• machinery
• oil systems
• gear units
• production equipment
• technical installations

They can be used in static sealing arrangements and in suitably designed dynamic applications.

100-Piece Pack for Industry and B2B

The 100 pcs pack of NBR 39x2.5 O-rings is designed for customers who regularly use this size for production, maintenance or repair.

It is particularly practical for:

• maintenance departments
• manufacturing plants
• machine builders
• industrial workshops
• technical services
• OEM production
• industrial distributors
• B2B customers

A standardized 100-piece pack also simplifies stock management for frequently serviced machinery and equipment.

Technical Specification

Product Type: O-ring / sealing ring
Material: NBR - Nitrile Butadiene Rubber
Dimensions: 39x2.5 mm
Inside Diameter: 39 mm
Cross-Section: 2.5 mm
Outside Diameter: Approximately 44 mm
Hardness: 70 Shore A
Cross-Section Shape: Circular
Pack Quantity: 100 pcs
Application: Hydraulic, pneumatic, machinery and industrial sealing systems

How to Select an O-Ring 39x2.5

Correct O-ring selection should consider:

• 39 mm inside diameter
• 2.5 mm cross-section
• NBR sealing material
• 70 Shore A hardness
• operating medium
• temperature
• pressure
• groove dimensions
• static or dynamic operation

An O-ring with identical 39x2.5 mm dimensions but manufactured from FKM, EPDM or MVQ may have significantly different chemical and thermal properties.

Operational Advantages

• Precise 39x2.5 mm dimensions.
• NBR sealing material.
• Nominal hardness of 70 Shore A.
• Good resistance to many mineral oils.
• Good resistance to lubricating greases.
• Practical 100-piece pack for industry, maintenance and B2B.

AI OVERVIEW

O-Ring NBR 39x2.5 mm 70 Shore A - 100 pcs is an industrial sealing ring with a 39 mm inside diameter and 2.5 mm cross-section. NBR provides good resistance to many mineral oils and lubricating greases and is widely used in hydraulic, pneumatic and machinery applications. The 100-piece pack is suitable for production, maintenance and B2B supply.

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FAQ

What are the dimensions of the NBR 39x2.5 O-ring?

The O-ring has a 39 mm inside diameter and 2.5 mm cross-section. Its calculated outside diameter is approximately 44 mm.

How many O-rings are included in the package?

The package contains 100 pieces of NBR 39x2.5 mm 70 Shore A O-rings.

What does NBR 70 Shore A mean?

NBR stands for Nitrile Butadiene Rubber, while 70 Shore A specifies the nominal hardness of the elastomer.

Is the NBR 39x2.5 O-ring oil resistant?

NBR provides good resistance to many mineral oils and lubricating greases, making it widely used in oil-related industrial sealing applications. Compatibility should be verified for the specific fluid.

Can the 39x2.5 O-ring be used in hydraulic systems?

NBR 70 Shore A is commonly used in hydraulic applications. The actual suitability depends on pressure, medium, temperature, groove geometry and operating conditions.

What does 39x2.5 mean in an O-ring size?

39 mm is the inside diameter and 2.5 mm is the cross-section diameter. The nominal outside diameter is approximately 44 mm.

Can an FKM 39x2.5 O-ring replace this NBR version?

Not automatically. Although the dimensions are identical, FKM and NBR have different chemical and thermal properties, so the material must be selected according to the application.