NBR Black O-Rings | Nitrile Rubber O Ring Seals | Industrial & Automotive Use
Model / SKU: nbr-black-o-ring-std
Premium NBR nitrile rubber black O-rings with excellent oil resistance and wear resistance. Available in a full range of standard sizes (metric & AS568 imperial), widely used for hydraulic systems, pneumatic devices, automotive parts, industrial machinery and pipeline sealing. Factory direct supply with large stock, ideal for industrial distributors, hydraulic parts suppliers, auto repair workshops and cross-border bulk procurement.
Tags: NBR black O ring, nitrile rubber o seal, industrial o ring seal, oil resistant o ring, assorted size o ring, hydraulic o ring seal, automotive rubber seal, factory direct o ring
Product photos
Technical summary
Product specifications. Refer to the approved drawing for dimensional tolerances and installation requirements.
| Spec | Value |
|---|---|
| Material | NBR |
| Material | NBR (nitrile butadiene rubber) |
| Color | Black |
| Hardness | 70±5 Shore A |
| Standard | ISO 3601 |
| Size range | Full metric & imperial sizes available |
| Type | Static & dynamic sealing element |
| Application | Hydraulic, pneumatic, automotive, industrial sealing |
| specifications | AS568 compliant |
| Size | AS568 compliant |
Pricing: request a quote (B2B / wholesale).
MOQ / commerce notes: In stock: ships in 1 to 2 days | Not in stock but still in current production: 10 to 15 days | Not in stock and not in production: 25 to 30 days
Product details
These NBR black O-rings are high-performance general-purpose sealing elements manufactured from premium grade nitrile rubber compound. They feature excellent resistance to petroleum oils, hydraulic fluids, lubricating greases and water, with good wear resistance and aging stability for long service life.
Available in a complete range of standard metric sizes and AS568 imperial sizes, they are widely applied in hydraulic systems, pneumatic cylinders, automotive engines and chassis, industrial valves and pipelines, agricultural machinery and general mechanical equipment for both static and dynamic sealing applications.
We maintain large stock of standard sizes to support fast delivery and volume procurement, serving global industrial distributors, hydraulic parts suppliers and automotive aftermarket channels.
Core value for buyers
- Full range of standard sizes, ready for immediate delivery
- Factory direct bulk pricing, cost-effective for large sourcing
- Stable quality consistency for industrial and automotive applications
- Flexible customization for special size and packaging requirements
Features & Benefits
- Premium NBR nitrile rubber formulation, excellent oil and wear resistance, wide compatibility with common industrial fluids
- Full range of standard metric & AS568 sizes, large ready stock for fast delivery
- Precision molding and flash trimming, consistent dimensional accuracy and reliable sealing performance
- Factory direct supply with competitive bulk pricing, cost-effective for large volume procurement
- Manufactured to ISO 3601 standards, stable batch quality and consistent performance
- Flexible customization options for special sizes, hardness levels and private label packaging
- Wide application coverage across hydraulic, automotive, industrial, agricultural and general machinery sectors
- Standard trade terms and full export document support for convenient cross-border procurement
Material & Process
- Material：Premium grade NBR (nitrile butadiene rubber)
- Color：Black
- Hardness：70±5 Shore A (other hardness available on request)
- Key performance：Oil resistant, wear resistant, water resistant, anti-aging, good compression set resistance
Working temperature range: -30℃ ~ +120℃ (standard NBR 70) - Compatible media：Hydraulic oil, gear oil, lubricating grease, water, general weak acid & alkali
Manufacturing process
Compression molding production
Precision flash trimming for smooth surface
Dimensional inspection per batch
Quality control aligned with ISO 3601 sealing standards
Upgrade option：FKM (viton) O-rings available for high temperature and chemical resistance requirements
Packaging & Delivery
Inner packaging：Sorted by size in sealed poly bags, size marking available.
Outer packaging：Standard export corrugated carton with moisture-proof lining. Custom packaging with private label available.
Packing quantity：Adjustable per bulk order requirements.
MOQ and lead time：In stock: ships in 1 to 2 days. Not in stock but still in current production: 10 to 15 days. Not in stock and not in production: 25 to 30 days.
Lead time
- In stock: ships in 1 to 2 days.
- Not in stock but still in current production: 10 to 15 days.
- Not in stock and not in production: 25 to 30 days.
- Custom services：Private label printing, custom packaging design, consolidated shipping for mixed sizes
- Shipping terms：EXW, FOB, CIF available
- Export documents：Commercial invoice, packing list, certificate of origin, material test report available on request
FAQ
What material are these black O-rings made of?
They are made of premium grade NBR (nitrile butadiene rubber), hardness 70 Shore A, with excellent oil and wear resistance.
What sizes of NBR O-rings do you offer?
We offer a full range of standard metric sizes and AS568 imperial sizes. Custom special sizes are also available on request.
What are NBR O-rings used for?
They are widely used for hydraulic systems, pneumatic devices, automotive parts, industrial valves, pipelines and general machinery sealing.
What is the temperature range for NBR 70 O-rings?
Standard NBR 70 Shore A O-rings work from -30℃ to +120℃, suitable for most general oil and hydraulic applications.
Do you have AS568 standard O-rings?
Yes, we supply both metric sizes and AS568 imperial standard O-rings, with large stock for fast delivery.
What is your MOQ for O-rings?
No minimum order quantity for stock standard sizes. Sample orders are supported for quality evaluation before bulk purchase.
What trade terms do you offer?
We offer EXW, FOB and CIF trade terms to support cross-border procurement.
Can you supply custom size O-rings?
Yes, we can produce custom sizes, hardness and special formulations according to your requirements.
Do you offer FKM O-rings for high temperature?
Yes, we also supply FKM (viton) O-rings for high temperature and chemically aggressive working conditions.
Can I mix different sizes in one order?
Yes, mixed sizes and types are supported in one order, with consolidated shipping to reduce logistics cost.