O-ring 3.5x1.2 NBR 70 ShA

O-ring 3.5x1.2 NBR 70 ShA - 100 pcs

O-ring 3.5x1.2 NBR 70 ShA is an elastomeric sealing ring with an inside diameter of 3.5 mm and a cross-section of 1.2 mm, manufactured from NBR nitrile rubber with a hardness of 70 Shore A. It is designed for sealing applications where NBR is compatible with the operating medium and working conditions. Supplied in packs of 100 pcs.

Technical data

O-ring 3.5x1.2 mm dimensions

The designation 3.5x1.2 mm defines the two basic dimensions of the O-ring:

• 3.5 mm - inside diameter

• 1.2 mm - cross-section diameter

Both dimensions must be verified when selecting an O-ring. Sealing rings with the same inside diameter but a different cross-section are not automatically interchangeable.

NBR 70 Shore A - material and hardness

This O-ring is manufactured from NBR - nitrile butadiene rubber, one of the most commonly used elastomers for technical sealing applications.

NBR provides good resistance to many mineral oils, greases and conventional technical fluids. For this reason, NBR O-rings are widely used in hydraulic and pneumatic systems, machinery, equipment and general industrial sealing applications.

The 70 Shore A hardness is a widely used specification for NBR O-rings, providing a practical balance between elasticity, sealing capability and resistance to deformation.

Applications of O-ring 3.5x1.2 NBR

NBR O-rings are commonly used in:

• hydraulic systems

• pneumatic systems

• valves and fittings

• pumps

• machinery and industrial equipment

• mechanical assemblies

• oil and lubrication systems

• general technical sealing applications

Suitability for a specific application must always be verified according to the operating medium, temperature, pressure, type of movement and groove design.

How to select an O-ring 3.5x1.2 mm

Before ordering, verify:

• 3.5 mm inside diameter

• 1.2 mm cross-section

• NBR material

• 70 Shore A hardness

• operating medium

• operating temperature

• pressure

• static or dynamic operation

• groove dimensions and design

Dimensions alone are not sufficient to determine whether an O-ring is suitable for a particular application.

NBR vs FPM, EPDM and MVQ O-rings

An NBR 70 Shore A O-ring should not automatically be replaced with an FPM, EPDM or MVQ O-ring simply because the dimensions are identical.

These elastomers have different resistance characteristics and operating properties. The material should always be selected according to the medium, temperature and conditions of the sealing application.

Alternative designations and search references

The product may also be identified as:

• O-ring 3.5x1.2 NBR

• O-ring 3.5x1.2 NBR 70 ShA

• O-ring 3.5x1.2 NBR 70 Shore A

• NBR O-ring 3.5x1.2

• 3.5x1.2 mm O-ring

• 3.5x1.2 NBR sealing ring

• O-ring 3.5x1.2 NBR 100 pcs

• NBR 70 O-ring 3.5x1.2

• nitrile O-ring 3.5x1.2 mm

FAQ

What are the dimensions of the O-ring 3.5x1.2?

The O-ring has an inside diameter of 3.5 mm and a cross-section of 1.2 mm.

What material is the O-ring made from?

It is manufactured from NBR - nitrile butadiene rubber.

What is the hardness of the O-ring?

The material hardness is 70 Shore A.

How many O-rings are included in one pack?

Each package contains 100 pcs of O-rings 3.5x1.2 NBR 70 Shore A.

Is NBR resistant to oil?

NBR offers good resistance to many mineral oils and greases. Compatibility should always be verified for the specific medium and operating conditions.

Can a 3.5x1.2 O-ring be replaced with a 3.5x1.5 O-ring?

Not automatically. Changing the cross-section from 1.2 mm to 1.5 mm affects groove fit, compression and sealing performance.

Is an FPM 3.5x1.2 O-ring the same product?

No. The dimensions may be identical, but FPM and NBR are different elastomers with different chemical and temperature resistance characteristics.

O-ring 3.5x1.2 NBR 70 Shore A - key information

O-ring 3.5x1.2 NBR 70 Shore A is a sealing ring with a 3.5 mm inside diameter and 1.2 mm cross-section, manufactured from nitrile rubber with a hardness of 70 Shore A. Supplied in packs of 100 pcs for technical and industrial sealing applications compatible with NBR.

Available from simmering.pl, a specialist supplier of sealing solutions and industrial components. Stock in Poland with worldwide shipping.