O-Ring NBR 18.3x2.4 mm 70 Shore A

What Is the O-Ring NBR 18.3x2.4 mm 70 Shore A 1000 pcs?

O-Ring NBR 18.3x2.4 mm 70 Shore A is a technical sealing ring manufactured from NBR (Nitrile Butadiene Rubber, Buna-N) and supplied in a bulk package of 1000 pieces. It has an 18.3 mm inside diameter and a 2.4 mm cross-section. The 1000-piece variant is intended for B2B purchasing, industrial production, OEM assembly, MRO maintenance, repetitive servicing and companies requiring a reliable stock of identical technical seals.

Technical Specification

Product Type: O-Ring / Sealing Ring

Material: NBR, Nitrile Butadiene Rubber, Buna-N

Hardness: 70 Shore A

Inside Diameter: 18.3 mm

Cross Section: 2.4 mm

Approximate Outside Diameter: 23.1 mm

Colour: Black

Typical Operating Temperature: approximately -30°C to +100°C

Resistance: mineral oils, mineral-based hydraulic oils, lubricating greases and other compatible industrial fluids

Package Quantity: 1000 pcs

O-Ring 18.3x2.4 NBR for Industrial Applications

The 18.3x2.4 mm NBR O-Ring is suitable for technical sealing applications where the same seal size is regularly consumed during production, maintenance or equipment assembly.

Typical applications include:

• Hydraulic systems
• Pneumatic systems
• Valves
• Control valves
• Technical fittings
• Pumps
• Industrial automation
• Machinery components
• Production equipment
• Repetitive assembly processes
• MRO maintenance
• Industrial spare parts inventories

Before installation, verify the groove dimensions, required compression, operating temperature and compatibility of NBR with the working medium.

Why NBR 70 Shore A?

NBR 70 Shore A is one of the most widely used elastomers for industrial O-rings, particularly where resistance to mineral oils and lubricating greases is required.

Important properties include:

• Very good resistance to mineral oils
• Good resistance to lubricating greases
• Good abrasion resistance
• Good mechanical strength
• Suitable sealing elasticity
• Wide applicability in hydraulic systems
• Wide applicability in pneumatic equipment
• Suitable properties for many machinery sealing applications

The 70 Shore A hardness provides a practical balance between elastic deformation required for sealing and mechanical stability under operating loads.

Benefits of the 1000-Piece Bulk Pack

The 1000 pcs package is intended for companies that regularly consume the same O-ring size.

Operational benefits include:

• Bulk quantity for industrial requirements
• Reduced purchasing frequency
• Convenient warehouse stock
• Supply for repetitive assembly operations
• Improved availability for maintenance teams
• Suitable quantity for production processes
• Easier replenishment of MRO inventories
• Efficient supply to multiple assembly or service stations

For purchasing and maintenance departments, a bulk package provides a practical way to maintain a consistent stock of 18.3x2.4 mm NBR O-rings.

Hydraulic and Pneumatic Applications

The O-Ring NBR 18.3x2.4 mm can be used in appropriately designed hydraulic and pneumatic sealing systems.

In hydraulic equipment, NBR is commonly selected for applications involving compatible mineral oil-based hydraulic fluids. In pneumatic systems, O-rings are widely used in valves, fittings, distributors and control components.

Final selection should consider:

• Operating pressure
• Temperature
• Working medium
• Groove geometry
• Static or dynamic operation
• Required O-ring compression

Production and OEM Applications

The 1000-piece pack is suitable for companies using the same O-ring in repetitive assembly and production processes.

Potential applications include:

• OEM components
• Machinery manufacturing
• Hydraulic equipment production
• Pneumatic component assembly
• Industrial valve production
• Equipment refurbishment
• Technical subassemblies
• Repetitive production operations

For serial assembly, maintaining consistent dimensions, elastomer type and hardness is important for repeatable sealing performance.

MRO Maintenance and Warehouse Stock

The O-Ring 18.3x2.4 NBR 70 Shore A 1000 pcs can be maintained as an MRO spare part in industrial facilities where this particular seal size is used across multiple machines or components.

Keeping the required O-ring in stock helps maintenance teams respond efficiently during:

• Preventive maintenance
• Scheduled overhauls
• Emergency repairs
• Hydraulic servicing
• Pneumatic equipment repairs
• Machinery refurbishment

A 1000-piece package is particularly useful where annual consumption justifies maintaining a dedicated inventory position.

B2B Supply and Resellers

The bulk variant is also suitable for industrial distributors, resellers, service companies and technical supply businesses.

For B2B identification, the key purchasing parameters are:

Inside Diameter: 18.3 mm

Cross Section: 2.4 mm

Material: NBR

Hardness: 70 Shore A

Package: 1000 pcs

These parameters should be verified against the technical requirements of the intended application.

Storage of NBR O-Rings

NBR O-rings should be stored in appropriate conditions to preserve their elastomer properties.

Protect them from:

• Direct sunlight
• Ozone sources
• Excessive heat
• Excessive humidity
• Incompatible chemicals
• Unnecessary stretching
• Mechanical deformation

Correct storage is especially important for 1000-piece bulk packs, where the seals may be consumed gradually over an extended period.

Frequently Asked Questions (FAQ)

Who is the 1000 pcs O-Ring 18.3x2.4 pack intended for?
It is primarily intended for manufacturing companies, industrial maintenance departments, OEM assembly, service companies, resellers and other B2B customers with regular consumption.

Is the O-Ring 18.3x2.4 NBR suitable for hydraulic oil?
NBR is compatible with many mineral oil-based hydraulic fluids. Compatibility with the specific fluid should always be verified.

Why is the 2.4 mm cross-section important?
The cross-section determines how the O-ring fits and compresses inside the sealing groove. It should not be replaced with another size without checking the groove design.

Is a 1000-piece pack suitable for MRO inventory?
Yes. For facilities regularly using this size, the bulk pack provides a practical stock for scheduled maintenance and emergency repairs.

Can NBR 70 Shore A be used in pneumatic systems?
Yes. NBR 70 Shore A is widely used in pneumatic sealing applications when pressure, temperature and medium conditions are suitable.

Frequently Asked Questions from Engineers and Maintenance Teams

What is the outside diameter of an 18.3x2.4 mm O-ring?
The nominal outside diameter is approximately 23.1 mm.

Can 70 Shore A be replaced with 90 Shore A?
Not automatically. Changing hardness affects deformation, sealing behaviour and resistance to extrusion, so the application requirements must be evaluated first.

Is this O-ring suitable for repetitive production assembly?
Yes, provided the 18.3x2.4 mm dimensions, NBR material and 70 Shore A hardness match the technical specification of the assembly.

Why purchase 1000 O-rings in one package?
For regular industrial consumption, a bulk package reduces purchasing frequency, supports production continuity and provides an immediately available warehouse stock.

Are the dimensions alone sufficient when selecting a replacement?
No. In addition to 18.3x2.4 mm, the elastomer material, hardness, operating temperature, working medium and groove design should be verified.