Are you in the market for custom size O-rings and feeling overwhelmed by the options? You’re not alone! With countless factories in China, finding the right one can be a daunting task. Understanding the top manufacturers is crucial, as it can significantly impact the quality and cost of your products. Imagine having access to the best options that ensure durability and reliability for your projects. Ready to simplify your search and make informed decisions? Dive into our comprehensive comparison of the leading O-ring factories in China and discover the perfect partner for your needs!

O-Rings, Rubber Seals – Best China Manufacturer & Supplier – Savvy

Product Details: High-Quality Rubber O-Rings manufactured by Savvy, available in various materials including NBR, FKM, and Silicone.

Technical Parameters:
– Temperature Range: -70°C to 220°C
– Standard Hardness: Shore A 60 to 90

Application Scenarios:
– Used in hydraulic and pneumatic transmission systems
– Sealing applications for various fluids such as air, water, and oil

Pros:
– Low manufacturing cost and convenient use
– Self-sealing effect with no need for periodic adjustment

Cons:
– Difficult to achieve zero leakage in dynamic seals
– Can be prone to cutting, twisting, and breaking if used improperly

Custom Rubber Seals & O-rings Manufacturer | Haisun Rubber

Product Details: HAISUN manufactures precision O-rings such as NBR, HNBR, AMQ, FKMT, EDPM, ACM, and CR, and supplies standard O-ring parts and O-ring kits.

Technical Parameters:
– O-ring dimension accuracy tolerance up to 0.01mm
– Rubber seals accurate tolerance up to 0.02mm

Application Scenarios:
– Smartphones
– Automotive parts

Pros:
– High precision and quality control
– Wide range of materials and applications

Cons:
– Limited information on specific performance metrics
– Potentially higher cost for custom solutions

Custom O-Rings, Custom Molded O-Ring China Manufacturer – Savvy

Custom O Ring Manufacturing in China with Quick Tooling Development and …

Product Details: Custom rubber products including O-Rings, X-Rings, gaskets, rubber seals, and diaphragms made from various rubber materials such as EPDM, FKM, and silicone.

Technical Parameters:
– Temperature range: -40°C to 327°C for FFKM O-Rings
– Diameter options for O-Rings: >500mm for large O-Rings

Application Scenarios:
– Automotive applications including O-Ring seals and fuel line systems
– Industrial applications such as oil & gas and HVAC systems

Pros:
– Customized high-performance rubber solutions
– Good compatibility with various chemicals and environments

Cons:
– Limited information on specific performance metrics
– Potential variability in rubber hardness and material properties

O Rings Manufacturer | O Rings Supplier – Hongjie Rubber Seal

Product Details: Wholesale O Rings in Bulk from Hongjie, a professional O rings manufacturer in China since 2000, offering custom O rings wholesale services.

Technical Parameters:
– One-stop O rings OEM/ODM solution.
– Various international O-Ring standards with most sizes already tooling.

Application Scenarios:
– Automotive industry.
– Hydraulic & Pneumatic applications.

Pros:
– Affordable factory direct price.
– Certificated compounds to meet specific markets.

Cons:
– Limited information on specific technical parameters.
– No detailed cons provided in the content.

Custom O-ring Manufacturer and Wholesale Supplier – Hongju

Product Details: Custom O-rings and high-temperature O-ring seals manufactured by Hongju, suitable for engines, pumps, cylinders, connectors, valves, etc.

Technical Parameters:
– Material: Silicone rubber
– Hardness tolerance: ±3-5A, following ISO3601 standards

Application Scenarios:
– Static and dynamic sealing applications
– Used in various products requiring resistance to water, oil, and high temperatur…

Pros:
– High-quality materials and precision molds
– Fast tooling and manufacturing times

Cons:
– Limited information on specific material types
– Potential variability in shipping times based on location

Custom Silicone O-ring Manufacturers in China – TOGOHK

Product Details: Custom Silicone O-rings manufactured by TOGOHK, suitable for various industries including food and medical.

Technical Parameters:
– Temperature range: -30°C to 200°C
– Standard sizes from 1mm to 500mm

Application Scenarios:
– Used in sealing systems for food processing
– Applicable in pharmaceutical and personal care product manufacturing

Pros:
– Excellent low and high-temperature resistance
– FDA-compliant and suitable for food and medical industries

Cons:
– Limited to specific geometric shapes
– Potential for higher costs in custom designs

High-quality O-rings By Haisun | Custom & Standard Parts

Product Details: NBR o-ring

Technical Parameters:
– Material stand by Reach, RoHS, FDA, PAHS, TSCA
– Tolerance: ±0.02mm

Application Scenarios:
– Manufacturing various oil resistant products
– Automotive parts and household appliances

Pros:
– Heat resistance
– Oil resistance
– Water resistance

Cons:
– Poor cold and ozone resistance
– Relatively high price

Custom O-Rings | McMaster-Carr

Product Details: Custom O-Rings from McMaster-Carr

Technical Parameters:
– Material: Various options available
– Size: Customizable dimensions

Application Scenarios:
– Sealing applications in machinery
– Fluid containment in piping systems

Pros:
– Wide range of materials and sizes
– Quick delivery options available

Cons:
– Potentially higher cost for custom sizes
– Limited information on specific material properties

Top 10 O-ring Manufacturers and Suppliers in China (2025)

Product Details: O-rings are circular cross-section sealants used to prevent leakage of liquids and gases. They are manufactured using various techniques such as injection, extrusion, and compression molding, with materials like nitrile rubber, silicone, EPDM rubber, and Fluorocarbon.

Technical Parameters:
– Standard and metric sizes
– Low minimum order quantities (MOQs)

Application Scenarios:
– Automotive industry
– Aerospace industry

Pros:
– Wide range of products
– Customization available

Cons:
– Potential quality variations
– Dependence on supplier reliability

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Comparison Table

Company	Product Details	Pros	Cons	Website
O-Rings, Rubber Seals – Best China Manufacturer & Supplier – Savvy	High-Quality Rubber O-Rings manufactured by Savvy, available in various materials including NBR, FKM, and Silicone.	– Low manufacturing cost and convenient use – Self-sealing effect with no need for periodic adjustment	– Difficult to achieve zero leakage in dynamic seals – Can be prone to cutting, twisting, and breaking if used improperly	savvyrubber.com
Custom Rubber Seals & O-rings Manufacturer	Haisun Rubber	HAISUN manufactures precision O-rings such as NBR, HNBR, AMQ, FKMT, EDPM, ACM, and CR, and supplies standard O-ring parts and O-ring kits.	– High precision and quality control – Wide range of materials and applications	– Limited information on specific performance metrics – Potentially higher cost for custom solutions
Custom O-Rings, Custom Molded O-Ring China Manufacturer – Savvy				savvyrubber.com
Custom O Ring Manufacturing in China with Quick Tooling Development and …	Custom rubber products including O-Rings, X-Rings, gaskets, rubber seals, and diaphragms made from various rubber materials such as EPDM, FKM, and sil…	– Customized high-performance rubber solutions – Good compatibility with various chemicals and environments	– Limited information on specific performance metrics – Potential variability in rubber hardness and material properties	rubberproducer.com
O Rings Manufacturer	O Rings Supplier – Hongjie Rubber Seal	Wholesale O Rings in Bulk from Hongjie, a professional O rings manufacturer in China since 2000, offering custom O rings wholesale services.	– Affordable factory direct price. – Certificated compounds to meet specific markets.	– Limited information on specific technical parameters. – No detailed cons provided in the content.
Custom O-ring Manufacturer and Wholesale Supplier – Hongju	Custom O-rings and high-temperature O-ring seals manufactured by Hongju, suitable for engines, pumps, cylinders, connectors, valves, etc.	– High-quality materials and precision molds – Fast tooling and manufacturing times	– Limited information on specific material types – Potential variability in shipping times based on location	hongjusilicone.com
Custom Silicone O-ring Manufacturers in China – TOGOHK	Custom Silicone O-rings manufactured by TOGOHK, suitable for various industries including food and medical.	– Excellent low and high-temperature resistance – FDA-compliant and suitable for food and medical industries	– Limited to specific geometric shapes – Potential for higher costs in custom designs	www.togohk.com
High-quality O-rings By Haisun	Custom & Standard Parts	NBR o-ring	– Heat resistance – Oil resistance – Water resistance	– Poor cold and ozone resistance – Relatively high price
Custom O-Rings	McMaster-Carr	Custom O-Rings from McMaster-Carr	– Wide range of materials and sizes – Quick delivery options available	– Potentially higher cost for custom sizes – Limited information on specific material properties
Top 10 O-ring Manufacturers and Suppliers in China (2025)	O-rings are circular cross-section sealants used to prevent leakage of liquids and gases. They are manufactured using various techniques such as injec…	– Wide range of products – Customization available	– Potential quality variations – Dependence on supplier reliability	hongjusilicone.com

Frequently Asked Questions (FAQs)

What are custom size O rings?

Custom size O rings are rubber or elastomeric seals designed to fit specific dimensions and applications. They are used to create a tight seal between two surfaces, preventing leaks of fluids or gases. By ordering custom sizes, you ensure that the O rings meet your exact requirements for performance and compatibility.

Why should I choose a factory in China for O rings?

Choosing a factory in China can offer you competitive pricing, a wide range of materials, and advanced manufacturing capabilities. Many Chinese factories specialize in producing high-quality O rings, allowing you to benefit from cost-effective solutions without compromising on quality.

What materials are commonly used for O rings?

O rings can be made from various materials, including nitrile rubber, silicone, fluorocarbon, and neoprene. The choice of material depends on the application, temperature range, and chemical exposure. Discussing your specific needs with the factory can help you select the best material for your O rings.

How do I ensure quality when ordering from a factory?

To ensure quality, request samples before placing a large order, and check for certifications like ISO. Communicate your specifications clearly and consider visiting the factory if possible. Building a good relationship with the manufacturer can also help maintain quality standards throughout production.

What is the typical lead time for custom O rings?

The lead time for custom O rings can vary based on the complexity of your order and the factory’s workload. Generally, you can expect a lead time of 2 to 4 weeks for production, plus additional time for shipping. Always confirm the timeline with the factory to plan accordingly.