O-ring 16x2 NBR 70 ShA

AI Overview

NBR O-Rings 16x2 mm with a hardness of 70 Shore A are elastomer sealing rings intended for hydraulic, pneumatic, mechanical and general industrial applications. Each O-Ring has an inside diameter of 16 mm and a cross-section of 2 mm. NBR is commonly used in sealing systems exposed to mineral oils, lubricating greases and many standard hydraulic fluids. The pack contains 100 identical O-Rings, making it suitable for maintenance departments, technical service companies, machine manufacturers, repair workshops and B2B customers requiring a practical stock of one specific sealing size.

What Makes This Product Different

The 16x2 mm O-Ring is designed for compact and medium-sized sealing grooves where a relatively slim 2 mm cross-section is required.

The 16x2 mm designation means:

• Inside Diameter: 16 mm
• Cross Section: 2 mm

The approximate outside diameter of the uncompressed O-Ring is 20 mm. Correct selection should not be based on the outside diameter alone. The inside diameter, cross-section, material, hardness, groove geometry and operating conditions must all be considered.

The 100-piece package is a practical solution for maintenance, repair work, small production batches and repair kit assembly. It provides a useful quantity without requiring the customer to purchase a large industrial pack.

A hardness of 70 Shore A offers a balanced combination of flexibility, mechanical stability and resistance to excessive deformation in correctly designed sealing grooves.

Construction and Operating Principle

An O-Ring is a continuous elastomer ring with a circular cross-section. It is installed inside a machined groove and compressed between two mating surfaces.

Controlled compression causes the elastomer to create sealing contact against the groove and the adjacent component. This contact limits the movement of oil, grease, compressed air or another medium compatible with NBR.

In pressurised systems, the operating medium can increase sealing efficiency by forcing the O-Ring against the low-pressure side of the groove. Effective operation still depends on correct compression, suitable surface finish, controlled extrusion clearance and proper material compatibility.

O-Rings can be used in static sealing systems and selected dynamic applications. Dynamic operation requires additional consideration of movement speed, friction, lubrication, surface quality and operating pressure.

Material Properties

NBR, also known as Nitrile Butadiene Rubber, is one of the most widely used elastomers in technical sealing applications.

The material provides:

• good resistance to mineral oils,
• compatibility with many lubricating greases,
• good abrasion resistance,
• suitable mechanical strength,
• reliable performance in many hydraulic applications,
• suitability for numerous pneumatic systems,
• good dimensional stability under normal service conditions.

A hardness of 70 Shore A is commonly selected for general-purpose industrial O-Rings. It allows the seal to deform sufficiently during installation while maintaining resistance to excessive compression and mechanical damage.

The typical operating temperature range of standard NBR compounds is approximately -30°C to +100°C. Actual limits depend on the rubber formulation, operating medium, pressure, exposure time and application conditions.

NBR is generally not recommended for prolonged exposure to hot steam, ozone, intensive UV radiation, glycol-based brake fluids or strongly oxidising chemicals.

Typical Industrial Applications

NBR O-Rings 16x2 mm may be used in:

• hydraulic valves,
• pneumatic valves,
• oil fittings,
• pressure regulators,
• technical plugs,
• threaded connections,
• compact manifolds,
• pumps,
• lubrication systems,
• machine covers,
• bushes and sleeves,
• industrial equipment,
• agricultural machinery,
• workshop machinery,
• automation components,
• repair kits.

Application suitability should always be verified according to the groove dimensions, operating fluid, pressure, temperature and movement type.

Typical Failure Symptoms

The O-Ring should be replaced when any of the following conditions are observed:

• oil leakage,
• grease leakage,
• compressed air loss,
• pressure reduction,
• permanent flattening,
• surface cracking,
• hardened rubber,
• excessive stretching,
• local abrasion,
• cuts caused during installation,
• elastomer swelling,
• extrusion into the clearance gap,
• loss of elasticity.

Repeated failure in the same assembly may indicate incorrect groove dimensions, excessive clearance, sharp edges, poor lubrication or incompatibility between the NBR material and the operating medium.

Recommended During Installation

Before installation:

• confirm the 16x2 mm dimensions,
• clean the sealing groove,
• remove all remains of the old seal,
• inspect the surfaces for burrs,
• protect the O-Ring from sharp threads and edges,
• apply a lubricant compatible with NBR,
• avoid unnecessary stretching,
• prevent twisting,
• do not use sharp installation tools,
• verify correct positioning before assembly.

The O-Ring should be seated evenly inside the groove. Twisting or local stretching may result in uneven compression and premature leakage.

A removed O-Ring should generally be replaced rather than reused. Permanent compression, microscopic cuts or material ageing may reduce its sealing performance.

Technical Specification

Manufacturer: GRN

Product Type: O-Ring

Size: 16x2 mm

Inside Diameter: 16 mm

Cross Section: 2 mm

Approximate Outside Diameter: 20 mm

Material: NBR

Full Material Name: Nitrile Butadiene Rubber

Hardness: 70 Shore A

Colour: Black

Cross Section Shape: Round

Typical Temperature Range: Approximately -30°C to +100°C, depending on compound and operating conditions

Typical Media: Mineral oils, lubricating greases and selected technical fluids compatible with NBR

Application: Static sealing and selected dynamic sealing systems

Sales Unit: Pack of 100 pieces

Groove Design Considerations

Correct selection of a 16x2 mm O-Ring requires verification of the groove dimensions and operating conditions.

The following parameters should be considered:

• groove diameter,
• groove width,
• groove depth,
• cross-section compression,
• permitted O-Ring stretch,
• operating pressure,
• extrusion clearance,
• operating temperature,
• fluid compatibility,
• surface finish,
• type of movement.

Insufficient compression may result in leakage. Excessive compression may increase friction, raise operating temperature and accelerate permanent deformation.

At elevated pressure or with excessive extrusion clearance, an additional back-up ring may be required.

Related Components

Depending on the sealing system, the O-Ring may be used together with:

• back-up rings,
• guide rings,
• X-rings,
• piston seals,
• rod seals,
• rotary shaft seals,
• flat gaskets,
• sealing washers,
• mounting sleeves,
• hydraulic oils,
• assembly lubricants.

Why B2B Customers Choose the Pack of 100

A pack of 100 pieces is suitable for companies that require a practical working stock without purchasing a large bulk package.

The O-Rings may be used as:

• maintenance inventory,
• workshop consumables,
• repair kit components,
• machine assembly parts,
• small-batch production components,
• replacement seals for regular servicing,
• stock for hydraulic or pneumatic repairs.

The package supports convenient inventory management and ensures that replacement seals are available when maintenance work is required.

Professional Industrial Supply

The product is suitable for:

• machine manufacturers,
• production facilities,
• maintenance departments,
• hydraulic service companies,
• pneumatic workshops,
• industrial repair companies,
• agricultural machinery workshops,
• repair kit manufacturers,
• sealing suppliers,
• B2B customers.

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FAQ

What does the 16x2 mm size mean?

The first value indicates an inside diameter of 16 mm. The second value indicates a cross-section of 2 mm. The approximate outside diameter is 20 mm.

Can the 16x2 NBR O-Ring be used with hydraulic oil?

NBR is commonly used with mineral oils and many standard hydraulic fluids. Compatibility should always be checked for the specific fluid and operating conditions.

How many O-Rings are included?

The package contains 100 identical O-Rings with the 16x2 mm size, NBR material and 70 Shore A hardness.

Can this O-Ring be used in pneumatic equipment?

Yes, provided that the groove design, pressure, temperature and operating medium are suitable for an NBR O-Ring of this size.

Can a removed O-Ring be reused?

Reuse is not recommended. A removed O-Ring may have permanent compression, installation damage or reduced elasticity.

When may a back-up ring be necessary?

A back-up ring may be required in high-pressure systems or where a large extrusion clearance could allow the elastomer to be forced out of the groove.

How should NBR O-Rings be stored?

Store them in closed packaging in a cool, dry and shaded location. Protect the seals from heat, ozone, UV radiation, sharp objects and aggressive chemicals.