Rubber Seals and O-Rings
NBR O-Rings
NBR O-rings in nitrile rubber, chosen for their oil resistance.
Product Overview
NBR O-rings in nitrile rubber, chosen for their oil resistance. They are used mainly in the automotive industry, in aerospace, in wire and cable applications and in home appliances. NBR resists oils, fuels and other hydrocarbons better than most general-purpose elastomers, which is why it remains the default material wherever oil is present and cost matters.
Key benefits
Why Buyers Choose This Specification
Oil and Fuel Resistance
NBR resists oils, fuels and other hydrocarbons, which is the single property that governs seal life in an engine, gearbox or hydraulic circuit.
Cost Without Compromise
NBR costs far less than fluoroelastomer and does the job wherever temperature and chemistry stay within its range. Specifying FKM where NBR suffices is money spent for nothing.
Consistent Performance in Oil-Saturated Environments
The resistance is inherent to the polymer rather than a coating, so performance does not degrade with time in service.
Established Across Four Industries
Automotive, aerospace, wire and cable, and home appliances all use NBR O-rings as standard.
Application scenarios
Where It Is Used
- Automotive engine and fluid system sealing
- Aerospace hydraulic and fuel systems
- Wire and cable gland sealing
- Home appliance water and fluid seals
- Hydraulic circuits handling mineral oil
- General industrial sealing where oil is present
Who it is for
The Buyers This Product Suits
Automotive Manufacturers
The automotive industry is the primary market for NBR O-rings, wherever oil or fuel contacts a seal.
Aerospace Suppliers
Aerospace is a named application, where the oil resistance matters as much as it does in automotive.
Appliance and Cable Manufacturers
Both are named applications where NBR provides adequate sealing at the right cost.
Problems it solves
What It Fixes
Seals Swelling in Oil
NBR's oil resistance is what prevents the swelling and softening that destroys an unsuitable elastomer in oil service.
Over-Specifying Expensive Materials
Where the chemistry and temperature stay within NBR's range, it does the same job as a fluoroelastomer at a fraction of the cost.
Inconsistent Seal Life
Selecting the right polymer for the fluid is what makes seal life predictable enough to plan maintenance around.
Specifications
Published Figures For This Product
Every value below comes from our own product specification. Where a figure is not published we leave it out rather than estimating it.
| Material | NBR nitrile rubber |
|---|---|
| Key Property | Good oil resistance |
| Resists | Oils, fuels and other hydrocarbons |
| Primary Industry | Automotive |
| Other Applications | Aerospace, wire and cable, home appliances |
| Sizing | By inside diameter and cross-section |
| Grade | Nitrile rubber |
Packing and documents
How It Ships And What Comes With It
Packing And Loading
Shipping volume for this item depends on the configuration and capacity you select, so no fixed container figure is published. Confirm the specification and the destination and a loading plan is issued with the quotation, rather than a figure we cannot support.
Documentation On File
- Rubber Seals and Plastics · Rubber Seals and O-Rings Specification Sheet20.5 KB
- Catalogue · Full Product Catalogue154.0 KB
Sourcing And Inspection
This product is supplied through TrueGlow Imaging, working with manufacturing partners whose facilities are visited and verified rather than taken on trust. In-process quality control and delivery supervision are available so goods are inspected before the container is sealed. Certifications quoted on this page are those stated on the product specification and belong to that product range rather than to our trading entity, so ask for the certificate covering your specific item.
Handling guide
Getting It Right First Time
Step 1
Confirm the fluid is a mineral oil, fuel or hydrocarbon before specifying NBR.
Step 2
Check the operating temperature is inside NBR's range, since it is narrower than FKM's.
Step 3
Do not use NBR with ketones, strong acids or ozone-rich environments.
Step 4
Measure inside diameter and cross-section when ordering replacements.
Step 5
Replace rather than reuse after disassembly.
Comparison
How It Compares In Our Range
NBR against the higher-specification fluoroelastomers.
| NBR O-Ring | Good oil, fuel and hydrocarbon resistance at low cost. Automotive, aerospace, wire and cable, home appliances. |
|---|---|
| FKM O-Ring | Wider chemical and temperature range, including acids and hydraulic fluids, at a considerably higher price. |
| HNBR Seals | Hydrogenated nitrile, used predominantly for cold medium sealing and in automotive power steering and oil seals. |
FAQ
NBR O-Rings Questions
What is NBR good at?
Oil resistance. It resists oils, fuels and other hydrocarbons, which is why it is the standard material where those are present.
Which industries use NBR O-rings?
Mainly automotive, along with aerospace, wire and cable, and home appliances.
When should we choose a different material?
Where temperature or chemistry falls outside NBR's range, for instance with strong acids or high temperatures, FKM or FFKM is the correct choice.
Can you supply custom sizes?
Yes. Send the inside diameter, cross-section and quantity.
Is NBR cost-effective?
Yes, it balances cost and performance, which is what makes it the default oil-service elastomer.
What quantities do you supply?
From maintenance quantities through to production volumes.
Related products
Other Products Buyers Look At
Industries
Sectors That Use This Product
Metal Fabrication and Machine Shops
Custom parts, tooling and the cranes that move them around the shop.
Warehousing and Heavy Industry
Lifting from 250 kg to 360 tons, indoors on a runway or outdoors on legs.
Food Packaging Lines
Depalletizing to palletizing, balanced against the filler in the middle.
Further reading
Guides That Cover This Product
Selecting an O-Ring Material NBR EPDM FKM or FFKM
Almost every seal failure is a material selection error rather than a dimensional one. The fluid and the temperature decide the elastomer, and the size is the easy part.
Quote NBR O-Rings
Send the capacity or size you need, the quantity and the destination, and we will confirm the configuration, the lead time and a loading plan.