Do I need to lubricate the O ring during installation?

Yes, lubrication is highly recommended to prevent the ring from twisting or tearing during assembly. Use a thin layer of the same fluid being sealed, or a compatible silicone grease.

What is the difference between Buna-N and Nitrile?

There is no difference. Buna-N, Nitrile, and NBR (Nitrile Butadiene Rubber) are all different names for the same synthetic elastomer material.

What is the MOQ for customized orders?

The Minimum Order Quantity (MOQ) for customized rubber O rings is 5000 PCS.

NBR O-Ring 70 Shore a Oil Resistant Buna-N Rubber Seals

Name: NBR O-Ring 70 Shore a Oil Resistant Buna-N Rubber Seals
Brand: SHANGHAI QINUO INDUSTRY CO., LTD.
SKU: 2147387062

Shanghai, ChinaSHANGHAI QINUO INDUSTRY CO., LTD.

US$0.03

5,000-49,999 Pieces

US$0.02

50,000-99,999 Pieces

US$0.01

100,000+ Pieces

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Material

NBR

Application

Industry

Model NO.

Standard and Non-Standard

Type

O Ring

Performance

High Pressure

Shape

O-Ring

Standard

Product Name

Rubber O Ring

MOQ

5000PCS

Color

Customized Accepted

Size

Customized Accepted

Service

OEM .ODM .Customized

Sample

Availabe

Delivery Time

7-15days

Hardness

40-90 Shore a

Keyword

Rubber O Rings

Logo

Customized Accepted

Certificate

ISO9001

Transport Package

Plastic Bags and Cartons

Specification

other

Trademark

Royal Way

Origin

China

HS Code

4016931000

Production Capacity

1000000PCS/Month

Key features

Oil & Fuel Resistance: NBR material offers exceptional resistance to petroleum oils, fuels, and lubricants.

Custom Color & Size: Color and Size are customized accepted to meet specific project requirements.

High Pressure Performance: 70 Shore A hardness provides ideal balance of flexibility and pressure resistance.

ISO 9001 Certified: Manufactured in ISO 9001:2015 certified facility with rigorous quality control.

OEM/ODM Service: Supports OEM, ODM, and customized services for unique engineering needs.

Vacuum Application Ready: High density and low gas permeability make NBR effective for vacuum systems.

Traceability System: Unified coding system ensures complete end-to-end traceability for every component.

Fast Delivery: Standard delivery time is 7-15 days for efficient project turnaround.

Company profile

Experienced TeamImporters and Exporters100% Finished Products InspectionRaw-Materials Traceability

SHANGHAI QINUO INDUSTRY CO., LTD.

Shanghai, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 8 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤4.45h

AI-Powered supplier vetting

SummaryShanghai Qinuo Industry Co., Ltd. is described as a Shanghai-based rubber seal manufacturer serving the oil and gas sector, with additional applications in automobiles, household appliances, and machinery. It provides ODM, OEM, and broad customization services, and reports new product development during the past year. Production resources include assembling, laser marking, milling, precision preforming, cutting, trimming, and vulcanization equipment. Quality controls include uniformly followed finished-product inspection instructions, quality assurance, complaint-handling procedures with records, and raw-material traceability. The supplier reports export sales of 51%–70% and participation in the Calgary Global Oil Show, but no overseas warehouses, showrooms, agents, or branches. Financial records are referenced for 2021–2023, although the provided information does not establish financial strength. Certification holdings, SDK availability, environmental assessment status, and fire-drill status are not...

Supplier typeThe supplier is explicitly described as Shanghai Qinuo Industry Co., Ltd., a professional rubber seal manufacturer providing design and production services for rubber, plastic, and machined parts. Its stated industries include oil and gas, automobiles, household appliances, and machinery equipment.

After-Sales capabilityThe supplier has a clear customer-complaint procedure with followed records and a corrective and preventive action mechanism with records. However, it reports no overseas warehouse, showroom, agent, or branch, and overseas service coverage is listed as zero, limiting evidence of localized after-sales support.

R&D capabilityThe supplier is described as integrating R&D, production, and sales, reports new products during the past year, and offers ODM services. It also reports no available SDK, but SDK availability is not necessary evidence against general product innovation capability.

Production capacityProduction capability is supported by stated manufacturing specialization and equipment including assembling, laser marking, milling, precision preforming, cutting, trimming, and vulcanization machines. Finished-product inspection instructions are uniformly followed, with quality assurance and raw-material traceability also reported.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also provides ODM services, indicating broad design-to-production adaptability.

Client casesThe supplier states that it provides OEM services for well-known brands, markets the Royal Way and SHQN brands in the energy industry, and has participated in the Calgary Global Oil Show. These are customer and market references, but no named customer, project scope, or verifiable case details are provided.

Product Q&A

Q:What is the benefit of a 70 Shore A hardness for NBR seals?

It is the 'universal' hardness. It provides enough elasticity to seal effectively against rougher metal surfaces while offering enough rigidity to handle standard industrial pressures without extruding into gaps.

Q:Can I use NBR O rings for outdoor water systems?

While NBR is waterproof, it is sensitive to sunlight and ozone. If the seal is exposed to the air and sun, it may develop small cracks over time. For purely outdoor applications with no oil, EPDM is a better choice.

Q:Why do my NBR O rings swell in certain fluids?

Swelling is usually caused by chemical incompatibility. If NBR is exposed to polar solvents or high aromatic fuels, it will absorb the fluid and expand. Always verify compatibility with your specific fluid type.

Q:Are these seals suitable for vacuum applications?

Yes. Due to the high density and low gas permeability of Nitrile rubber, NBR is highly effective for maintaining seals in vacuum systems.

Q:How should I store NBR O rings to prevent aging?

Store them in an airtight bag in a cool, dark place. Avoid exposure to direct sunlight and keep them away from ozone producing equipment like large electric motors or transformers.