NBR Black O-Rings | Oil Resistant Nitrile Seals for Auto & Industry

NBR Black O-Rings | Oil Resistant Nitrile Rubber O Ring Seals | — main photo

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

NBR Black O-Rings | Oil Resistant Nitrile Rubber O Ring Seals | — photo 2 NBR Black O-Rings | Oil Resistant Nitrile Rubber O Ring Seals | — photo 3 NBR Black O-Rings | Oil Resistant Nitrile Rubber O Ring Seals | — photo 4

Key specs: Material: NBR | Spec & Model: NBR (nitrile butadiene rubber) | Spec & Model: Black | Spec & Model: 70±5 Shore A | Spec & Model: ISO 3601 | Spec & Model: Full metric & imperial sizes available | Spec & Model: Static & dynamic sealing element | Spec & Model: Hydraulic, pneumatic, automotive, industrial sealing

  • Material: NBR
  • Spec & Model: NBR (nitrile butadiene rubber)
  • Spec & Model: Black
  • Spec & Model: 70±5 Shore A
  • Spec & Model: ISO 3601
  • Spec & Model: Full metric & imperial sizes available
  • Spec & Model: Static & dynamic sealing element
  • Spec & Model: Hydraulic, pneumatic, automotive, industrial sealing
  • Spec & Model: AS568 compliant
  • Material: NBR (nitrile butadiene rubber)
  • Color: Black
  • Hardness: 70±5 Shore A

Technical summary

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SpecValue
MaterialNBR (nitrile butadiene rubber)
ColorBlack
Hardness70±5 Shore A
StandardISO 3601
Size rangeFull metric & imperial sizes available
TypeStatic & dynamic sealing element
ApplicationHydraulic, pneumatic, automotive, industrial sealing
规格型号AS568 compliant

Pricing: request a quote (B2B / wholesale).

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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. Produced under ISO 9001 quality management system with precision molding and flash trimming process, they deliver consistent dimensional accuracy and reliable sealing performance. 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

Material and 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

Application and compatibility

Product Type ：General purpose NBR O ring seals for industrial and automotive use Available sizes ：Full metric sizes & AS568 standard imperial sizes Compatible media ：Hydraulic oil, engine oil, gear oil, lubricating grease, water, general hydraulic fluids Typical applications Hydraulic system cylinder and valve sealing Pneumatic equipment and component sealing Automotive engine, chassis and transmission sealing Industrial pipeline and valve static sealing Agricultural machinery and equipment sealing General mechanical static and dynamic sealing Suitable for ：Industrial parts distributors, hydraulic & pneumatic suppliers, auto repair workshops, equipment maintenance departments, cross border industrial parts traders Buyer notice ：Please confirm required size (ID / cross section), working condition and media before ordering. Select appropriate material and hardness for specific working conditions.

Selection guide

Selection Guide 1. Confirm required inner diameter and cross section thickness, select standard metric or AS568 imperial size. 2. Standard NBR 70 Shore A is suitable for most general hydraulic, automotive and industrial applications within 30℃ 120℃. 3. For high temperature or strong chemical conditions, select FKM material upgrade. 4. For bulk project requirements, contact us for exclusive volume pricing. Installation Steps Surface Preparation Thoroughly clean the installation groove and sealing surface, remove burrs, dirt and residual impurities. Pre lubrication Apply compatible lubricating oil or grease evenly on the O ring and groove surface to avoid cutting during installation. Installation Place the O ring into the groove smoothly, avoid twisting, stretching or scratching with sharp edges. Post installation Check Confirm the O ring is properly seated in the groove without twisting, extrusion or damage.

Packaging and 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 ：No minimum order for stock sizes; sample orders supported for quality evaluation. Lead time Stock sizes ：Ship within 2 5 working days after payment Custom size orders: 25 40 working days Large volume bulk orders: Lead time to be confirmed based on quantity 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

There are only competing products—OEM and model—but not your part number. Can we use them as a reference for selection?

Sure. Please include the competing products/OEM model, key dimensions (ID × OD × height, in mm), and operating conditions (medium, temperature, pressure, rotational speed) to the inquiry form, and we will match them with equivalent specs items in our catalog.If dimensions are unavailable, please send model and photos/drawing first, and we will confirm the details. The final model selection will be based on the confirmation of drawing and operating conditions, and the official quotation will be subject to the written quotation order.

Does it support OEM/ODM along with privatization of packaging and tagging?

We support performing OEM/ODM in accordance with drawing/sample, as well as packaging and marking customization within the agreed upon scope.Please provide details on the target market’s compliance requirements and estimated annual volume. During the RFQ phase, we will confirm process feasibility, tooling costs, and mass production cycle time.

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.

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