Silicone O-ring 3.5x1.2 VMQ

Silicone O-ring 3.5x1.2 mm VMQ - 100 pcs.

Silicone O-ring 3.5x1.2 mm VMQ is an elastomeric sealing ring with a nominal inside diameter of 3.5 mm and a cross-section of 1.2 mm. It is made from VMQ silicone rubber and has a circular cross-section designed to create a seal when correctly installed and compressed in a suitable groove. The product is supplied in a pack of 100 pieces.

Technical data

The nominal outside diameter of 5.9 mm is derived geometrically from the 3.5 mm inside diameter and twice the 1.2 mm cross-section.

What does 3.5x1.2 mm VMQ mean?

The product designation identifies its essential dimensional and material characteristics:

• 3.5 mm - nominal inside diameter

• 1.2 mm - nominal cross-section diameter

• VMQ - silicone rubber

• 100 pcs. - quantity supplied in one package

For this O-ring, the dimension 3.5x1.2 mm means inside diameter x cross-section.

VMQ is the technical abbreviation used for this group of silicone elastomers. The alternative notation MVQ can also be encountered in commercial product descriptions, but VMQ is the preferred technical designation.

VMQ silicone rubber

VMQ is a silicone rubber used for elastomeric seals, including O-rings. Silicone elastomers are known as a material group for their temperature flexibility and resistance to weathering, ozone and UV exposure.

These are general characteristics of the VMQ material family and should not be interpreted as guaranteed performance values for this particular O-ring.

The exact temperature range, chemical resistance and mechanical properties depend on the specific VMQ compound and operating conditions. Since the compound grade for this product has not been specified, no exact operating temperature range is assigned to this SKU.

Similarly, the VMQ designation alone does not confirm FDA, food-contact, medical or other industry-specific approval. Such compliance must be confirmed for the specific compound.

Construction and operating principle

The Silicone O-ring 3.5x1.2 mm VMQ is a closed elastomeric ring with a circular cross-section of 1.2 mm.

It does not contain a spring, metal reinforcement or additional sealing lip. The sealing function is created by controlled deformation of the elastomer after installation in a correctly dimensioned groove.

When the O-ring is compressed between mating surfaces, its cross-section deforms and creates contact with the sealing surfaces. Correct groove geometry and compression are therefore essential to proper sealing performance.

Alternative designations and search references

Natural alternative descriptions for this product include:

• Silicone O-ring 3.5x1.2 mm VMQ

• O-ring 3.5x1.2 mm VMQ

• VMQ O-ring 3.5x1.2 mm

• Silicone O-ring 3.5x1.2 mm

• O-ring 3.5x1.2 VMQ

• O-ring 3.5x1.2 MVQ

• MVQ silicone O-ring 3.5x1.2 mm

• Silicone sealing ring 3.5x1.2 mm

These variants can describe the same basic combination of nominal dimensions and material type. They do not, however, prove that products from different sources use identical silicone compounds, tolerances, hardness grades or approvals.

Silicone O-ring 3.5x1.2 mm VMQ vs NBR, FKM and EPDM

O-rings with the same nominal dimensions of 3.5x1.2 mm may be manufactured from different elastomers.

A VMQ silicone O-ring should not automatically be replaced by an NBR, FKM or EPDM O-ring solely because the dimensions are identical.

Different elastomer families have different chemical, thermal and mechanical characteristics. Material selection must therefore take into account the operating medium, temperature, pressure, sealing movement and other application requirements.

Dimensional compatibility is only one part of O-ring interchangeability.

How to select the correct 3.5x1.2 mm O-ring

Before selecting or replacing this O-ring, verify:

• nominal inside diameter of 3.5 mm

• nominal cross-section of 1.2 mm

• groove dimensions and geometry

• required O-ring compression

• required elastomer material

• compatibility of VMQ with the operating medium

• operating temperature

• operating pressure

• static or dynamic operating conditions

• required hardness, if specified by the application

• required dimensional tolerances

• any required industry approvals or certifications

Two O-rings marked 3.5x1.2 mm are not necessarily fully interchangeable. Material, compound, hardness, tolerances and application requirements can differ even when the nominal dimensions are identical.

Applications

VMQ O-rings are used as sealing elements in appropriately designed sealing systems when the properties of the selected silicone compound are suitable for the operating conditions.

The dimension 3.5x1.2 mm alone does not confirm suitability for a particular machine, valve, pneumatic component, hydraulic component, appliance, automotive assembly or other equipment.

For replacement applications, the O-ring should be selected according to the original seal specification, equipment documentation or verified engineering requirements of the sealing system.

Installation and handling

Before installation, make sure the groove and mating surfaces are clean and free from contamination.

The relatively small 1.2 mm cross-section requires careful handling. Protect the O-ring from sharp edges, burrs and threads that could cut or damage the elastomer during assembly.

Do not excessively stretch or twist the ring during installation. If an assembly lubricant is required, its compatibility with both VMQ silicone rubber and the operating medium should be confirmed before use.

O-rings should be stored away from conditions that could adversely affect elastomer properties.

FAQ

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

The nominal inside diameter is 3.5 mm and the nominal cross-section is 1.2 mm. The resulting nominal outside diameter is 5.9 mm.

What does 3.5x1.2 mm mean?

3.5 mm is the nominal inside diameter of the O-ring. The second value, 1.2 mm, is the nominal diameter of its circular cross-section.

What does VMQ mean?

VMQ is the standardized abbreviation used for silicone rubber, an elastomer material used for O-rings and other technical sealing components.

Are VMQ and MVQ the same material designation?

MVQ can be encountered as an alternative commercial notation for silicone O-rings. For precise technical identification, VMQ is the preferred designation for silicone rubber.

How many O-rings are included in the package?

The package contains 100 Silicone O-rings 3.5x1.2 mm VMQ.

Can a VMQ 3.5x1.2 mm O-ring be replaced by an NBR 3.5x1.2 mm O-ring?

Not automatically. Although the nominal dimensions are identical, VMQ and NBR are different elastomer families. Compatibility with the medium, temperature and other operating conditions must be verified before substitution.

What is the outside diameter of this O-ring?

The nominal outside diameter is 5.9 mm. This value is calculated from the 3.5 mm inside diameter plus twice the 1.2 mm cross-section.

Is this O-ring suitable for food contact?

The VMQ material designation alone does not confirm food-contact approval. Such compliance depends on the specific silicone compound and its certification. No food-contact approval should be assumed unless it is explicitly documented for this product.

Silicone O-ring 3.5x1.2 mm VMQ - key information

Silicone O-ring 3.5x1.2 mm VMQ is an elastomeric sealing ring with a nominal 3.5 mm inside diameter and 1.2 mm circular cross-section. It is manufactured from VMQ silicone rubber and is intended for installation in a correctly designed sealing groove. The product is supplied in a package containing 100 pieces.

The product is available from the specialist industrial supplier simmering.pl, with stock in Poland. Worldwide shipping and assistance with the identification and selection of technical seals are available.