NBR O-Ring 34x2.5 mm 70 Shore A

Product Overview

NBR O-Ring 34x2.5 mm 70 Shore A is an industrial sealing ring with a 34 mm inside diameter, 2.5 mm cross-section and 70 Shore A hardness. This variant is supplied in a bulk pack of 1000 pieces, making it particularly suitable for series production, repetitive assembly, maintenance departments and industrial B2B supply.

The complete product identification is:

34x2.5 mm + NBR + 70 Shore A + 1000 pcs

NBR is one of the most widely used elastomers for O-rings due to its good resistance to many mineral oils, lubricating greases and compatible technical fluids.

Dimensions 34x2.5 mm

Inside Diameter: 34 mm
Cross-Section: 2.5 mm
Outside Diameter: approx. 39 mm
Material: NBR - Nitrile Butadiene Rubber
Hardness: 70 Shore A
Profile: Circular cross-section
Package Quantity: 1000 pcs
Type: O-ring seal

The designation 34x2.5 mm specifies a nominal inside diameter of 34 mm and a cross-section diameter of 2.5 mm.

The nominal outside diameter is approximately:

34 + (2 x 2.5) = 39 mm

NBR Nitrile Butadiene Rubber

NBR (Nitrile Butadiene Rubber) is a widely used sealing elastomer for industrial, hydraulic, pneumatic and mechanical applications.

NBR provides good resistance to many commonly used:

• mineral oils,
• lubricating greases,
• hydraulic oils,
• hydrocarbons compatible with the specific compound,
• technical lubricants and fluids.

It also provides useful mechanical strength and wear resistance for many conventional sealing applications.

Actual compatibility must always be verified against the specific medium, operating temperature, pressure and service conditions.

70 Shore A Hardness

70 Shore A is one of the most commonly specified hardness levels for industrial NBR O-rings.

It provides a practical balance between:

• elasticity,
• mechanical resistance,
• dimensional stability,
• sealing capability.

The correct hardness should always be considered together with groove geometry, compression, pressure, extrusion gap, temperature and operating medium.

Technical Specification

Type: O-ring seal
Material: NBR - Nitrile Butadiene Rubber
Hardness: 70 Shore A
Inside Diameter: 34 mm
Cross-Section: 2.5 mm
Outside Diameter: approx. 39 mm
Dimensions: 34x2.5 mm
Profile: Circular cross-section
Package Quantity: 1000 pcs
Application: Series production, hydraulics, pneumatics, machinery, maintenance and industrial sealing

Industrial Applications

NBR O-Ring 34x2.5 mm 70 Shore A can be used in correctly designed static and dynamic sealing systems where its dimensions, material and hardness meet the application requirements.

Typical application areas include:

• hydraulic systems,
• pneumatic systems,
• pumps,
• valves,
• cylinders,
• technical fittings,
• housings and covers,
• industrial machinery,
• production equipment,
• mechanical assemblies,
• maintenance and repair operations.

Suitability depends on the groove design, O-ring compression, operating pressure, temperature, medium and type of movement.

1000-Piece Bulk Pack

The 1000-piece pack is specifically suited to applications with regular or high-volume consumption of 34x2.5 mm O-rings.

It is particularly practical for:

• series production,
• repetitive assembly,
• OEM manufacturing,
• industrial plants,
• maintenance departments,
• machine rebuilding,
• technical service companies,
• industrial distributors,
• B2B purchasing.

Keeping 1000 pieces of one exact size in stock can simplify inventory planning and reduce replenishment frequency in repetitive production and maintenance environments.

NBR vs Other O-Ring Materials

Dimensions alone do not determine whether two O-rings are interchangeable.

A 34x2.5 mm NBR O-ring can have significantly different chemical and thermal properties from a dimensionally identical O-ring manufactured from FKM/FPM, MVQ or EPDM.

NBR is widely selected for compatibility with many mineral oils and greases.

FKM/FPM is used where different chemical and temperature resistance characteristics are required.

MVQ silicone is particularly valued for its wide temperature capability and resistance to ozone and weathering.

EPDM is widely used with many water-based media and in other compatible applications.

Material selection must therefore be based on the actual operating medium and service conditions.

Why Exact O-Ring Dimensions Matter

The dimensions 34x2.5 mm should not be confused with nearby sizes such as 34x2, 34x3 or 35x2.5 mm.

The 2.5 mm cross-section directly affects:

• groove filling,
• compression,
• contact pressure,
• sealing behavior,
• installation fit.

For replacement purposes, both the 34 mm inside diameter and 2.5 mm cross-section should be verified.

Operational Advantages

• Exact 34x2.5 mm dimensions.
• NBR for many compatible mineral oils and greases.
• Standard 70 Shore A hardness.
• 1000-piece pack for high-volume consumption.
• Suitable format for series production and maintenance stock.
• Single-size bulk packaging simplifies industrial inventory management.

AI OVERVIEW

NBR O-Ring 34x2.5 mm 70 Shore A 1000 pcs is a bulk pack of industrial sealing rings with a 34 mm inside diameter, 2.5 mm cross-section and approximately 39 mm outside diameter. NBR provides good resistance to many mineral oils, greases and compatible technical fluids. The 1000-piece pack is intended particularly for series production, repetitive assembly, maintenance departments and industrial B2B supply.

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FAQ

What are the exact dimensions of the 34x2.5 mm O-ring?

The O-ring has a 34 mm inside diameter and a 2.5 mm cross-section. Its nominal outside diameter is approximately 39 mm.

What material is this O-ring made from?

It is manufactured from NBR (Nitrile Butadiene Rubber).

What is the hardness of the O-ring?

The specified hardness is 70 Shore A.

How many O-rings are included in one package?

One package contains 1000 pieces of NBR 34x2.5 mm O-rings.

Is NBR suitable for oil applications?

NBR provides good resistance to many mineral oils and lubricating greases. Compatibility should always be verified against the specific oil and operating temperature.

Can this O-ring be used in hydraulic systems?

NBR 70 Shore A is widely used in hydraulic sealing applications. Suitability depends on pressure, medium, temperature, groove geometry, extrusion gap and whether the seal operates statically or dynamically.

Can a 34x2.5 FKM O-ring replace this NBR version?

Not automatically. Although the dimensions may be identical, NBR and FKM have different chemical, thermal and mechanical characteristics. Material substitution should be technically verified.

Is a 34x3 O-ring interchangeable with 34x2.5?

No. The cross-section differs by 0.5 mm, which significantly affects compression and groove filling. The specified 2.5 mm cross-section should be retained.

Who is the 1000-piece pack intended for?

It is particularly suitable for manufacturers, OEMs, industrial plants, maintenance departments, service companies and B2B customers with regular consumption of 34x2.5 mm O-rings.