Nitrile O-Ring Cord
Flexible, Oil-Resistant NBR Cord for Fast and Cost-Effective Sealing Solutions
If you need a reliable sealing solution without the cost or lead time of molded parts, Nitrile O-ring cord (NBR cord) is a smart choice.
This solid, precision-extruded rubber cord is widely used to manufacture custom O-rings on demand, especially for maintenance teams, OEM manufacturers, and repair operations. It offers strong resistance to oils, fuels, and common industrial fluids, making it one of the most practical materials for general-purpose sealing.
At Xiamen Jinshun Sealing Technology, we supply high-quality nitrile rubber cord in a wide range of diameters, ready for cutting, bonding, and installation.
Why Choose Nitrile O-Ring Cord?
Built for Real Industrial Conditions
NBR (Nitrile Butadiene Rubber) is known for one thing: excellent oil resistance. That's why it's widely used in automotive, machinery, and hydraulic systems.
Key Benefits:
- Strong resistance to petroleum oils, fuels, and greases
- Good performance in hydraulic and pneumatic systems
- Flexible and easy to cut and bond
- Cost-effective alternative to molded O-rings
- Stable performance in -20°C to +90°C environments
- Consistent hardness for reliable sealing
Product Specifications
| Item | Specification |
|---|---|
| Product Name | Nitrile O-Ring Cord (NBR Cord) |
| Material | Nitrile Rubber (NBR) |
| Hardness | 70 Shore A (standard) |
| Color | Black |
| Diameter Range | 1.6 mm to 30 mm |
| Temperature Range | -20°C to +90°C |
| Structure | Solid extruded cord |
| Chemical Resistance | Oils, fuels, greases, hydrocarbons |
| Flexibility | High |
| Supply Format | Meter length / rolls |
| Custom O-Rings | Available (cut & bonded) |
| Certifications | NSF, FDA, LFGB, ACS, WRAS, UL (depending on compound) |
Available Sizes & Customization
We stock a wide range of standard diameters from 1.6 mm up to 30 mm, available by the meter. This flexibility allows buyers to:
- Cut exact lengths for specific grooves
- Produce custom O-rings quickly
- Reduce inventory of multiple molded sizes
Need Custom O-Rings Instead?
We also provide bonded nitrile O-rings, made from cord using high-strength adhesives. This is especially useful when:
- Small batch quantities are required
- Non-standard sizes are needed
- Fast turnaround is critical
- Tooling cost needs to be avoided
Typical Applications
Maintenance & Repair (MRO)
Perfect for emergency repairs where standard O-ring sizes are not available.
Automotive Industry
Used in fuel systems, oil seals, and hydraulic components.
Industrial Equipment
Reliable sealing for pumps, valves, compressors, and machinery.
Hydraulic & Pneumatic Systems
Handles oil-based fluids and pressure environments effectively.
General Manufacturing
Ideal for OEMs needing flexible sealing options without tooling investment.
Nitrile O-Ring Cord vs Molded O-Rings
| Feature | Nitrile O-Ring Cord | Molded O-Rings |
|---|---|---|
| Cost | Lower for small batches | Higher due to tooling |
| Lead Time | Fast | Longer |
| Custom Sizes | Unlimited | Limited to mold |
| Strength | Good (bonded joint) | Excellent (seamless) |
| Flexibility | High | Moderate |
Why Work With Xiamen Jinshun Sealing Technology?
With over 20 years of experience in sealing solutions, we support global B2B buyers with consistent quality and flexible manufacturing.
What You Get:
- Direct factory pricing
- Stable compound quality
- Fast sample turnaround (1–2 weeks)
- Custom bonding service for O-rings
- Bulk production capability
- Export-ready packaging
- Technical support for material selection
Quality Assurance You Can Trust
We understand that sealing failure is not an option. That's why we control every step:
- Raw material inspection
- Shore hardness testing
- Dimensional accuracy checks
- Batch traceability
- Optional third-party inspection (SGS, TÜV, Intertek)
FAQs
1. What is Nitrile O-ring cord used for?
It is mainly used to make custom O-rings, especially for maintenance, repair, and non-standard sealing applications.
2. Can I order small quantities?
Yes. NBR cord is available by the meter, making it ideal for small batch use.
3. How are custom O-rings made from cord?
The cord is cut to length and bonded using high-strength adhesive to form a complete ring.
4. Is the joint as strong as molded O-rings?
Bonded joints are strong for most applications, but for high-pressure dynamic systems, molded O-rings are recommended.
5. Can this cord be used for food applications?
Yes, if the compound meets FDA or other food-grade certifications.
6. What hardness options are available?
Standard is 70 Shore A, but other hardness levels can be customized.
7. What chemicals is NBR resistant to?
It performs well with oils, fuels, greases, and many hydrocarbons, but is not suitable for strong acids or ozone exposure.
8. What is the lead time?
Standard cord: usually in stock
Custom O-rings: depends on quantity, typically 1–2 weeks
How to Select the Right Nitrile O-Ring Cord
Before requesting a quote, it helps to confirm:
- Required diameter
- Application environment (oil, fuel, pressure)
- Temperature range
- Static or dynamic sealing
- Certification requirements
- Quantity needed
This helps us recommend the most suitable compound and size quickly.
Looking for a Reliable Nitrile O-Ring Cord Supplier?
Whether you need bulk NBR cord, custom O-ring fabrication, or a long-term sealing partner, we're ready to support your business.
Contact Xiamen Jinshun Sealing Technology today to get:
- Fast quotation
- Free sample support
- Custom O-ring solutions
- Stable factory supply
- Global shipping options
Send your size or drawing now and get a competitive quote within 24 hours.
