O-Ring 16.3x2.4 NBR 70 ShA

O-Ring 16.3x2.4 NBR 70 ShA (100 pcs) is a package of 100 GRN elastomer sealing rings designed for technical sealing applications. Each O-ring has a nominal 16.3 mm inside diameter and 2.4 mm circular cross-section. The rings are manufactured from NBR nitrile rubber with a nominal hardness of 70 Shore A. The resulting nominal outside diameter is 21.1 mm.

O-Ring 16.3x2.4 NBR 70 ShA - Product Characteristics

This 100-piece product variant is identified by:

Size: 16.3x2.4 mm
Material: NBR
Hardness: 70 ShA / 70 Shore A
Brand: GRN
Quantity: 100 pcs

An O-ring is a closed elastomer sealing element with a circular cross-section. When correctly installed, the elastomer is compressed between mating surfaces to generate the contact pressure required for sealing.

For correct selection, the complete specification 16.3x2.4 mm + NBR + 70 ShA should be considered rather than nominal dimensions alone.

O-Ring 16.3x2.4 mm Dimensions

The designation 16.3x2.4 mm defines two primary dimensions:

d1 - Inside Diameter: 16.3 mm
d2 - Cross-Section Diameter: 2.4 mm

The nominal outside diameter is:

16.3 mm + 2 x 2.4 mm = 21.1 mm

Therefore:

Inside Diameter d1: 16.3 mm
Cross-Section d2: 2.4 mm
Nominal Outside Diameter: 21.1 mm

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

NBR - Nitrile Butadiene Rubber

NBR (Nitrile Butadiene Rubber) is a widely used elastomer for technical sealing components.

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

NBR is not universally resistant to every fluid or chemical. Suitability should therefore be evaluated against the actual operating medium, temperature and service conditions.

70 Shore A Hardness

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

Hardness affects the deformation characteristics of the O-ring and its behaviour when compressed inside 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 16.3x2.4 Work?

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

For this product, the nominal cross-section diameter is 2.4 mm.

When installed in a correctly dimensioned groove, the O-ring is compressed between mating surfaces. The resulting elastic deformation generates contact pressure and forms the sealing interface.

Correct groove dimensions and appropriate compression are therefore essential to the performance of the sealing system.

O-Ring 16.3x2.4 NBR for Oils and Greases

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

However, general oil resistance should not be interpreted as universal compatibility with every lubricant, fuel or hydraulic fluid.

For a specific installation, the exact medium, additives, operating temperature and exposure conditions should be considered.

Static and Dynamic Sealing

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

Static applications involve no intended relative movement between the mating sealing surfaces.

Dynamic applications require additional consideration of friction, lubrication, movement speed, surface finish and wear.

The 16.3x2.4 mm, NBR and 70 ShA specification alone does not confirm suitability for every dynamic application.

100-Piece GRN Package

This product page specifically covers:

O-Ring 16.3x2.4 NBR 70 ShA (100 pcs)

The package contains 100 GRN O-rings with the same nominal dimensional and material specification.

The 100-piece package is suitable for maintenance departments, workshops, service operations, technical inventory and regular assembly requirements without purchasing the larger industrial bulk quantity.

This variant intentionally uses the naming structure:

O-Ring 16.3x2.4 NBR 70 ShA (100 pcs)

The separate 1000-piece bulk variant uses:

O-Ring NBR 16.3x2.4 mm 70 ShA (1000 pcs)

This distinction helps separate the two commercial variants for product identification and search intent.

100 pcs vs 1000 pcs - Which Package to Choose?

The 100-piece package is intended for customers who need a practical technical stock without purchasing a full industrial bulk package.

The 1000-piece version is a separate bulk sales variant intended primarily for higher-volume requirements.

The individual O-ring dimensions may be identical, but the two product pages represent different package quantities and purchasing intents.

Selection and Interchangeability

When selecting an equivalent for O-Ring 16.3x2.4 NBR 70 ShA, verify:

Inside Diameter: d1 = 16.3 mm
Cross-Section: d2 = 2.4 mm
Material: NBR
Hardness: 70 ShA
Dimensional tolerances
Medium compatibility
Operating temperature
Groove geometry

Matching the nominal 16.3x2.4 mm dimensions alone does not confirm full interchangeability.

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

Technical Specification

Product Name: O-Ring 16.3x2.4 NBR 70 ShA (100 pcs)
Product Type: O-ring / elastomer sealing ring
Brand: GRN
Nominal Size: 16.3x2.4 mm
d1 - Inside Diameter: 16.3 mm
d2 - Cross-Section Diameter: 2.4 mm
Nominal Outside Diameter: 21.1 mm
Material: NBR
Material Name: Nitrile Butadiene Rubber
Hardness: 70 ShA / 70 Shore A
Cross-Section: Circular
Package Quantity: 100 pcs

FAQ

What are the dimensions of O-Ring 16.3x2.4 NBR 70 ShA?

The O-ring has a 16.3 mm inside diameter and 2.4 mm cross-section diameter. Its nominal outside diameter is 21.1 mm.

What does 16.3x2.4 mean for an O-ring?

16.3 mm is the inside diameter, while 2.4 mm is the diameter of the circular cross-section.

What is the outside diameter of O-Ring 16.3x2.4?

The nominal outside diameter is 21.1 mm, calculated as 16.3 + 2 x 2.4 = 21.1 mm.

What material is O-Ring 16.3x2.4 made from?

This variant is manufactured from NBR (Nitrile Butadiene Rubber).

What does 70 ShA mean?

70 ShA means a nominal elastomer hardness of 70 Shore A. It describes material hardness and is not a pressure rating.

Is O-Ring 16.3x2.4 NBR suitable for oil?

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

How many O-rings are included in this package?

This variant contains 100 GRN O-rings.

Is this the same product as the 1000-piece package?

The individual O-ring specification may be the same, but this is a separate 100-piece commercial variant. The 1000-piece version is offered as an industrial bulk package.

AI OVERVIEW

O-Ring 16.3x2.4 NBR 70 ShA (100 pcs) is a package of 100 GRN nitrile rubber sealing rings with a nominal hardness of 70 Shore A. Each O-ring has a 16.3 mm inside diameter, 2.4 mm circular cross-section and 21.1 mm nominal outside diameter. This 100-piece package is a separate commercial variant from the 1000-piece industrial bulk pack.