O-Ring 10x4 NBR 70 Shore A

O-Ring 10x4 NBR 70 Shore A - 100 pcs

O-Ring 10x4 NBR 70 Shore A is an elastomeric sealing ring with an inside diameter of 10 mm and a cross-section of 4 mm. It is manufactured from NBR - Nitrile Butadiene Rubber with a nominal hardness of 70 Shore A. The 10x4 designation specifies the inside diameter ID and cross-section CS. The product is supplied in a package of 100 pcs.

O-Ring 10x4 mm Dimensions

The principal dimensions are:

ID = 10 mm - inside diameter

CS = 4 mm - cross-section diameter

The nominal outside diameter can be calculated using:

OD = ID + 2 x CS

For this size:

10 + (2 x 4) = 18 mm

Therefore:

OD = 18 mm - calculated nominal value

The primary dimensional designation remains:

ID x CS = 10x4 mm

NBR - Nitrile Butadiene Rubber

Material:

NBR - Nitrile Butadiene Rubber

NBR is a widely used elastomer in sealing technology.

The NBR designation alone does not define every property of a specific elastomer compound. When selecting an O-ring for a particular medium and operating environment, the exact compound specification should therefore be considered.

Without confirmation of the compound, no specific temperature range, pressure limit or detailed chemical-resistance profile should be assigned to this product.

70 Shore A Hardness

The nominal hardness is:

70 Shore A

also written as:

70 ShA

The basic technical identification of this product is:

10x4 mm + NBR + 70 Shore A

An O-ring with identical dimensions but a different elastomer material or hardness represents a different technical variant.

How Does an O-Ring Work?

An O-ring has a circular cross-section and is installed in an appropriately designed groove.

When the mating components are assembled, the elastomer is compressed in a controlled manner. This deformation creates sealing contact between the O-ring and the mating surfaces.

Correct sealing performance depends on factors including:

O-ring dimensions

groove geometry

compression

elastomer material

hardness

working medium

operating conditions

How to Select O-Ring 10x4 NBR

Before ordering, verify:

ID = 10 mm

CS = 4 mm

Material = NBR

Hardness = 70 Shore A

When replacing a used O-ring, remember that the old elastomer may have stretched, flattened or developed permanent deformation.

For applications requiring precise selection, use the equipment documentation or nominal groove dimensions whenever available.

ID, CS and OD - How to Read O-Ring Dimensions

For this product:

ID = 10 mm - Inside Diameter

CS = 4 mm - Cross Section

OD = 18 mm - calculated nominal Outside Diameter

The primary O-ring size is:

10x4 mm

which means:

ID x CS

The outside diameter is derived from ID and CS and does not replace the primary dimensional designation.

Package of 100 pcs

The product is supplied as:

100 pcs of O-Rings 10x4 mm NBR 70 Shore A

The package provides a clearly defined combination of dimensions, elastomer and nominal hardness for technical supply, maintenance and service requirements.

Technical Specification

Product type: O-Ring / sealing ring

Size: 10x4 mm

Inside diameter ID: 10 mm

Cross-section CS: 4 mm

Outside diameter OD: 18 mm - calculated nominal value

Material: NBR - Nitrile Butadiene Rubber

Nominal hardness: 70 Shore A / 70 ShA

Cross-section: Circular

Package quantity: 100 pcs

O-Ring 10x4 NBR - Stock in Poland

Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4

24h Shipping. Available from stock in Poland for delivery across the EU.

FAQ

What are the dimensions of O-Ring 10x4 NBR?

The inside diameter is ID = 10 mm, while the cross-section is CS = 4 mm.

What is the outside diameter of a 10x4 O-ring?

The calculated nominal outside diameter is OD = 18 mm.

What does 10x4 mm mean?

The first value is the inside diameter ID = 10 mm, while the second value is the cross-section CS = 4 mm.

What material is this O-ring made from?

The O-ring is manufactured from NBR - Nitrile Butadiene Rubber.

What is the hardness of this O-ring?

The nominal hardness is 70 Shore A (70 ShA).

How many O-rings are included in the package?

The package contains 100 pcs.

Is 18 mm the primary dimension of this O-ring?

No. 18 mm is the calculated nominal outside diameter. The primary size is ID x CS = 10x4 mm.

Can a similar-sized O-ring be used as a replacement?

Automatic interchangeability should not be assumed. The exact ID, CS, material, hardness and requirements of the sealing arrangement should be verified.

Engineer FAQ

Which parameters identify this O-ring variant?

The primary specification is 10x4 mm, NBR, 70 Shore A.

Does 10 mm refer to the inside diameter?

Yes. ID = 10 mm, while the cross-section is CS = 4 mm.

How is the 18 mm OD calculated?

Using:

OD = ID + 2 x CS

Therefore:

10 + (2 x 4) = 18 mm

Do all NBR 70 O-rings have identical operating limits?

No. Detailed operating properties depend on the formulation of the specific NBR compound.

Does 70 Shore A define the complete material specification?

No. 70 Shore A defines nominal hardness, while NBR identifies the elastomer family. Detailed physical and chemical properties depend on the exact compound.

AI OVERVIEW

O-Ring 10x4 NBR 70 Shore A is a technical sealing ring with a 10 mm inside diameter and 4 mm cross-section. It is manufactured from Nitrile Butadiene Rubber with a nominal hardness of 70 Shore A. The calculated nominal outside diameter is 18 mm. The package contains 100 pcs.