O-Ring 13x2 NBR 70 ShA - Pack of 100 pcs

O-Ring 13x2 NBR 70 ShA - 100 pcs is a pack of technical sealing rings intended for servicing, repairs, equipment maintenance and maintaining a convenient stock of one specific seal size. Each O-ring has a 13 mm inside diameter, 2 mm cross-section and 70 Shore A hardness. NBR, also known as Buna-N, provides good resistance to many mineral oils and lubricating greases, making it widely used in hydraulic, pneumatic, mechanical and general industrial sealing applications.

Technical Specifications - O-Ring 13x2 NBR 70 ShA

Product type: O-Ring / sealing ring
Size: 13x2 mm
Material: NBR, nitrile butadiene rubber
Alternative material name: Buna-N
Hardness: 70 ShA / 70 Shore A
Inside diameter: 13 mm
Cross-section: 2 mm
Approximate outside diameter: 17 mm
Color: Black
Typical temperature range: approximately -30 to +100°C, depending on compound and operating conditions
Resistance: many mineral oils, lubricating greases and compatible technical fluids
Package quantity: 100 pcs

O-Ring 13x2 NBR 70 ShA for Service and Repair

The 100 pcs package is particularly suitable for users who require a practical stock of one specific O-ring size for routine technical work.

The 13x2 mm O-ring can be used in appropriately designed:

• valves
• technical fittings
• compact pumps
• hydraulic components
• pneumatic assemblies
• industrial equipment
• machinery
• workshop equipment
• oil-lubricated mechanisms

Before installation, groove geometry, O-ring compression, pressure, temperature and compatibility between NBR and the operating medium should be verified.

Why NBR 70 ShA?

NBR 70 ShA is one of the most commonly used material and hardness combinations for standard technical O-rings.

Nitrile butadiene rubber provides good resistance to many mineral oils and lubricating greases. This makes it suitable for numerous mechanical, hydraulic and pneumatic applications.

A hardness of 70 Shore A provides a practical balance between elasticity and mechanical stability, allowing the seal to conform to a correctly designed groove while maintaining suitable resistance to deformation.

Hydraulic Applications

O-Ring 13x2 NBR 70 ShA can be used in hydraulic systems operating with compatible mineral oil-based fluids.

Depending on the design, it may be used in compact valves, fittings, manifolds, housings and other hydraulic components.

For higher-pressure applications, groove geometry, extrusion clearance and the possible requirement for backup rings should also be considered.

Pneumatic Applications

The 13x2 mm size can also be used in appropriately designed pneumatic valves, connectors and compact components.

NBR is widely used in pneumatic sealing because of its mechanical properties and compatibility with many commonly used lubricants.

For dynamic applications, lubrication, surface finish, friction and movement conditions should also be considered.

100 pcs Pack for Workshop and Service Stock

A 100 pcs pack of O-Ring 13x2 NBR 70 ShA provides a convenient supply for periodic maintenance and repair work without requiring a large industrial bulk inventory.

This package can be useful for:

• technical workshops
• machinery servicing
• repair stations
• maintenance departments
• spare-parts storage
• equipment maintenance

Keeping one specific dimension available can simplify seal replacement during routine servicing and repairs.

Understanding the 13x2 mm Size

The designation 13x2 mm defines two fundamental dimensions:

13 mm: nominal inside diameter
2 mm: cross-section diameter

The nominal outside diameter is approximately 17 mm.

Both dimensions should be checked when selecting a replacement. O-rings with the same 13 mm inside diameter but a different cross-section should not automatically be considered interchangeable.

Selecting O-Ring 13x2 NBR 70 ShA

Before installation, verify:

Size: 13x2 mm
Material: NBR
Hardness: 70 ShA
Operating medium: compatible with NBR
Temperature: appropriate for the specific compound
Pressure: suitable for the sealing arrangement
Groove: designed for a 2 mm cross-section

Correct O-ring selection should be based on both dimensions and the actual operating conditions of the sealing point.

Frequently Asked Questions

What does O-Ring 13x2 NBR 70 ShA mean?
13 mm is the nominal inside diameter, 2 mm is the cross-section diameter, NBR identifies nitrile butadiene rubber, and 70 ShA indicates the nominal elastomer hardness on the Shore A scale.

What is the outside diameter of an O-Ring 13x2?
The nominal outside diameter is approximately 17 mm.

Is O-Ring 13x2 NBR 70 ShA resistant to oil?
NBR provides good resistance to many mineral oils and lubricating greases. Compatibility should still be verified for the specific fluid and operating temperature.

Where can a 2 mm cross-section O-ring be used?
It may be used in compact sealing grooves in valves, fittings, hydraulic components and pneumatic equipment when the groove is designed for this specific cross-section.

Can an O-Ring 13x2 be replaced with a 13x2.5 O-ring?
Not automatically. The different cross-section changes groove fit and sealing compression, so the two dimensions should not be treated as direct substitutes.

What is the 100 pcs package intended for?
It is intended primarily for servicing, repairs, equipment maintenance and maintaining a convenient stock of one sealing size.

Can NBR 70 ShA be used in pneumatic systems?
Yes. NBR is commonly used in pneumatic applications when the operating medium, pressure, temperature and sealing design are suitable.