O-Ring 160x5 NBR 70 ShA

O-Ring 160x5 NBR 70 ShA is a GRN elastomer sealing ring with a 160 mm inside diameter and 5 mm circular cross-section. It is manufactured from NBR nitrile rubber with a nominal hardness of 70 Shore A. For the 160x5 mm geometry, the resulting nominal outside diameter is 170 mm.

O-Ring 160x5 NBR 70 ShA - Product Characteristics

The product is identified by the complete combination:

Size: 160x5 mm
Material: NBR
Hardness: 70 ShA / 70 Shore A
Brand: GRN
Cross-Section: Circular

An O-ring is a closed elastomer sealing element with a circular cross-section. Its sealing function is generated through controlled compression between mating surfaces after installation in a correctly designed groove.

For correct identification and replacement, the complete 160x5 mm + NBR + 70 ShA specification should be considered rather than dimensions alone.

O-Ring 160x5 mm Dimensions

The dimensional designation 160x5 mm means:

d1 - Inside Diameter: 160 mm
d2 - Cross-Section Diameter: 5 mm

The nominal outside diameter is calculated as:

160 mm + 2 x 5 mm = 170 mm

Therefore:

Inside Diameter d1: 160 mm
Cross-Section d2: 5 mm
Nominal Outside Diameter: 170 mm

For O-rings, the first dimension specifies the inside diameter, while the second specifies the diameter of the circular cross-section.

NBR - Nitrile Butadiene Rubber

NBR (Nitrile Butadiene Rubber) is one of the most widely used elastomers in technical sealing applications.

NBR is commonly selected for compatibility with many mineral oils, mineral greases and mineral-oil-based hydraulic fluids. These properties make nitrile rubber relevant to a broad range of mechanical, hydraulic and pneumatic sealing systems.

NBR is not universally resistant to every chemical or operating fluid.

For a specific application, compatibility should be evaluated against the actual medium, operating temperature, exposure duration and service conditions.

70 ShA Hardness

The designation 70 ShA specifies a nominal elastomer hardness of 70 Shore A.

Hardness influences how the O-ring deforms during installation and behaves under compression within the sealing groove.

The value 70 ShA is not a pressure rating.

Permissible operating pressure depends on the complete sealing arrangement, including groove geometry, extrusion gap, medium, temperature and operating conditions.

How Does O-Ring 160x5 NBR Work?

The sealing function is generated through controlled compression of the circular elastomer cross-section.

For this O-ring, the nominal cross-section diameter is 5 mm.

When installed in a correctly dimensioned groove, the elastomer is compressed between the mating surfaces. Its elastic deformation generates contact pressure against these surfaces and creates the sealing interface.

Effective sealing therefore depends on both the O-ring specification and the design of the complete sealing arrangement.

O-Ring NBR 160x5 and Oils

NBR is commonly used in sealing systems involving many mineral oils and mineral greases.

However, describing NBR as oil resistant does not mean that it is compatible with every lubricant, hydraulic fluid or fuel.

The exact fluid formulation, additives and operating temperature should be considered when selecting the sealing material.

For critical applications, compatibility should be verified against the specific operating medium.

Static and Dynamic Sealing

O-rings are widely used in static sealing arrangements and may also be used in appropriately engineered dynamic applications.

In static applications, there is no intended relative movement between the mating sealing surfaces.

Dynamic applications introduce additional factors including friction, lubrication, movement speed, surface finish and wear.

The 160x5 mm, NBR and 70 ShA specification alone therefore does not confirm suitability for every dynamic application.

Operating Temperature - Selection Note

A universal operating temperature range should not be assigned to this GRN O-ring based solely on the designation NBR 70 ShA.

Actual temperature capability depends on the exact NBR compound, operating medium, duration of exposure and service conditions.

For critical installations, the permitted temperature range should therefore be verified for the specific elastomer compound.

O-Ring 160x5 NBR 70 ShA Selection

When selecting an equivalent, compare at least:

• Inside Diameter: d1 = 160 mm
• Cross-Section: d2 = 5 mm
• Material: NBR
• Hardness: 70 ShA
• dimensional tolerances
• medium compatibility
• operating temperature
• groove geometry

Matching the nominal 160x5 mm dimensions alone is not sufficient to confirm complete interchangeability.

An O-ring manufactured from FKM, EPDM or VMQ may have identical nominal dimensions but different chemical and thermal characteristics.

Technical Specification

Product Name: O-Ring 160x5 NBR 70 ShA
Product Type: O-ring / elastomer sealing ring
Brand: GRN
Nominal Size: 160x5 mm
d1 - Inside Diameter: 160 mm
d2 - Cross-Section Diameter: 5 mm
Nominal Outside Diameter: 170 mm
Material: NBR
Material Name: Nitrile Butadiene Rubber
Hardness: 70 ShA / 70 Shore A
Cross-Section: Circular

FAQ

What are the dimensions of O-Ring 160x5 NBR 70 ShA?

The O-ring has a 160 mm inside diameter and 5 mm cross-section diameter. Its nominal outside diameter is 170 mm.

What does 160x5 mm mean for an O-ring?

160 mm is the inside diameter, while 5 mm is the diameter of the circular cross-section.

What is the outside diameter of a 160x5 mm O-ring?

The nominal outside diameter is 170 mm, calculated as 160 + 2 x 5 = 170 mm.

What does NBR mean?

NBR means Nitrile Butadiene Rubber, an elastomer widely used for technical sealing elements.

What does 70 ShA mean?

70 ShA specifies a nominal hardness of 70 on the Shore A scale. It is an elastomer hardness specification and not a pressure rating.

Can O-Ring 160x5 NBR be used with oil?

NBR is compatible with many mineral oils and greases. Suitability should still be verified for the exact operating fluid, additives and temperature.

Is a 160x5 FKM O-ring interchangeable with this NBR version?

Not automatically. The dimensions may be identical, but FKM and NBR have different chemical and temperature resistance characteristics.

Can O-Ring 160x5 be used for static sealing?

O-rings are widely used for static sealing. Correct suitability depends on the groove geometry, compression, medium, pressure, temperature and other operating conditions.

AI OVERVIEW

O-Ring 160x5 NBR 70 ShA is a GRN nitrile rubber sealing ring with a nominal hardness of 70 Shore A. It has a 160 mm inside diameter, 5 mm circular cross-section and 170 mm nominal outside diameter. The circular elastomer cross-section generates sealing contact through controlled compression in a correctly designed groove.