Are you looking for the best o-ring manufacturers in China, especially for those precise 5 mm o-rings? If so, you’re in the right place. Here, we’ll compare some of the top Chinese factories that specialize in producing high-quality o-rings, highlighting their strengths, product ranges, and what sets them apart from the competition. Let’s dive in and find the perfect fit for your needs.

5mm x 1.5mm (8mm OD) Nitrile O-Rings

Product Details: The 5mm x 1.5mm (8mm OD) Nitrile O-Rings are made from nitrile material (NBR) with a Shore Hardness of 70A. They have an inner diameter of 5.0mm, an outer diameter of 8.0mm, and a cross section of 1.5mm. The tolerance is ±0.1mm. These o-rings operate within a temperature range of -35°C to 110°C and have a tensile strength of 14 MPa, elongation of 430%, and a specific gravity of 1.23. They are black in color and should be stored away from direct sunlight, high voltage electrical equipment, extremes of heat and cold, and excessive moisture.

Pros:
– High tensile strength and elongation, ensuring durability and flexibility.
– Wide temperature range (-35°C to 110°C) suitable for various applications.
– Stored in a controlled environment to maintain quality.
– Available in bulk orders with tiered pricing for larger quantities.

Cons:
– Requires careful storage to avoid degradation from sunlight, ozone emissions, an…
– Needs to be kept away from excessive moisture prior to usage.
– Chemical compatibility should be checked using the provided tool to ensure suita…

FKM O Rings, China NBR O Ring supplier

5 mm colored small rubber o ring for waterproof

Product Details: The 5 mm colored small rubber O-ring is manufactured by AC Rubber Factory. Key details include: Place of Origin – Guangdong, China; Brand Name – AC; Material – Rubber (NBR); Size – Various sizes available (e.g., 3×1, 4×2, 8×2); Shape – O and square; Function – Waterproof, dustproof, airproof; Hardness – 70 Shore A; Certification – ROHS; Supply Ability – 1,000,000 pieces per week; Packaging – 5,000 pcs/bag, 30,000pcs/CTN; Port – Shenzhen. The product is customizable in terms of size, shape, and color, and it can be used in various applications such as electron components, medical equipment, home appliances, and

mechanical equipment.

Pros:
– Suitable for a variety of seal forms: static seals, dynamic seals, and various m…
– Effective for sealing different media: oil, water, gas, and chemical media.
– Wide temperature range (-60°C ~ +220°C) and high pressure resistance (up to 1500…
– Simple, compact design with easy assembly and disassembly.
– Self-sealing and reliable sealing performance.
– Customizable according to customer requirements (size, shape, color).
– Cost-effective and lightweight.

Cons:
– May require specific material selection based on the application environment.
– Limited surface rubbing speed for rotating members.
– Potential for slight running leakage in reciprocating piston and cylinder applic…

Custom O Ring Manufacturing in China with Quick Tooling …

Product Details: OBTiv Technology Co., LTD offers a wide range of rubber seal products, including O-Rings, X-Rings, Y-Rings, gaskets, PTFE bonded rubber seals, and more. They follow the IATF 16949 standards for automotive O-ring seals and use APQP and PPAP procedures. The company has expertise in enhancing rubber performance for low-temperature, conductivity, and chemical resistance. They provide customized high-performance rubber solutions for various industrial applications, including thermal management systems, fuel lines, air conditioning systems, and more. Materials available include EPDM, FKM, FVMQ, and others, with options for lubricated O-rings and self-lubricated materials. They also support O-ring size calculation and design[2].

Pros:
– Wide range of rubber seal products available
– Compliance with IATF 16949 standards for automotive applications
– Enhanced rubber performance for low-temperature, conductivity, and chemical resi…
– Customized high-performance rubber solutions for various industrial applications
– Support for O-ring size calculation and design
– Options for lubricated and self-lubricated materials

Cons:
– Limited information on the specific durability and lifespan of the O-rings
– No detailed pricing information available on the website
– Dependence on specific material selection which can be complex for some users

Large diameter store rubber o rings – Kin by Rice n Roll

Product Details: Kin by Rice n Roll is a small, family-run restaurant operated by Rice n Roll family members. It is located in the Wauwatosa neighborhood and is known for its homemade, fresh, tasty, and fun Asian food and sushi. The restaurant serves a modernized look and authentic taste from across Asia, especially Thailand and Japan.

Pros:
– Family-run restaurant with a passionate approach to homemade cooking
– Offers a variety of Asian food and sushi with a modernized look and authentic ta…
– Serves dishes from Thailand and Japan

Cons:
– No specific cons mentioned on the website

China O Rings Manufacturers and Suppliers

5mm 10mm small flat clear silicone rubber o ring colored oval …

Product Details: Part Name: O RINGS. Material: Silicone or rubber (NR, NBR, SBR, BR, IR, CR, EPDM, IIR). Material Hardness: Silicone about 20~80 Shore A; rubber about 30~90 Shore A. Size: Customized. Shape: Customized. Color: Customized according to Pantone colors. Temperature Resistance: -40~300 degree centigrade. Tolerance: 0.05mm. Technology: Hot pressing molding or injection Molding. Second Processing: Vulcanizing / Deburring / Silk-screen / Carving / printing. Quality control: Internal QC control.

Pros:
– Suitable for various seal forms: static seals, dynamic seals for different uses.
– Compatible with a variety of movement patterns: rotation, axial reciprocating mo…
– Effective for sealing different media: oil, water, gas, chemical media.
– Wide temperature range (-60 °C ~ +220 °C) and high pressure resistance (up to 15…
– Simple, compact design with easy assembly and disassembly.
– Self-sealing and reliable sealing performance.
– High precision, good heat resistance, and long-term durability.

Cons:
– Requires careful storage to avoid exposure to direct sunlight, high voltage elec…
– Limited information on specific product certifications beyond ROHS.

O-Ring Kits – China Manufacturer & Supplier – Savvy

China Imported Iron Cut O Rings, Thickness: 5mm

Product Details: China Imported Iron Cut O Rings: Thickness – 5mm, Material – Iron, Shape – Round, Weight Per Item – 10gm, Diameter – 125mm, Color – Nickel. Minimum Order Quantity – 500 Pieces. Supplied by Gaas International, a wholesaler based in Vasant Kunj, New Delhi. The company has been an IndiaMART member since December 2022 and has a 90% response rate.

Pros:
– Available in stock
– Specific dimensions (thickness: 5mm, diameter: 125mm) suitable for precise appli…
– Supplied by a responsive wholesaler with a good response rate
– Clear product specifications and supplier details

Cons:
– High minimum order quantity of 500 pieces
– Limited material option (only iron)
– No information on durability or performance under various conditions

PTFE Coated FKM O-rings With Black, Green Color

Product Details: PTFE coated or encapsulated O-rings consist of a core material, typically FKM (Viton®) or silicone, coated or encapsulated with a thin layer of PTFE. These O-rings offer a wide temperature range, typically from -60°C to +260°C (-76°F to +500°F), and are suitable for both cryogenic and high-temperature applications. They are available in various colors and provide excellent chemical resistance and low friction, making them ideal for industries such as aerospace, chemical processing, food and beverage production, and pharmaceutical manufacturing.

Pros:
– Excellent chemical resistance to a wide range of aggressive chemicals.
– Low friction surface, enhancing operational flexibility and reducing wear in dyn…
– High temperature and cryogenic compatibility.
– FDA-compliant and suitable for applications requiring non-contamination, such as…
– Available in various colors and special compounds tailored to specific requireme…

Cons:
– Encapsulated O-rings are exclusively used in static applications as movement or…
– The fluoropolymer jacket’s slight stiffness may require custom application desig…
– Installation may require special techniques, such as using hot water or installa…

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About O-Ring Factories in China

What materials are commonly used by O-ring factories in China?

O-ring factories in China use a variety of materials, including Nitrile (NBR), Ethylene Propylene Diene Monomer (EPDM), Silicone, Fluorinated Rubber (FKM/Viton), and more. Each material has its own unique properties, such as resistance to chemicals, oils, or extreme temperatures, making them suitable for different applications.

Can I customize the size and shape of O-rings from Chinese manufacturers?

Yes, you can customize the size and shape of O-rings. Many Chinese manufacturers, like Dongguan Hongju Silicone Rubber Products Co., Ltd. and Tianjin King Seal, offer customized O-ring solutions based on your specifications. They can produce both standard and non-standard sizes, as well as different shapes, to meet your specific needs.

What is the typical lead time for producing and shipping O-rings from China?

The lead time for producing and shipping O-rings from China can vary but generally ranges from 5 to 15 days. This depends on the complexity of the order, the production capacity of the factory, and the shipping method chosen. For example, AC Rubber Factory can finish mold making within 5 days and mass production within 7-15 days.

How do Chinese O-ring manufacturers ensure the quality of their products?

Chinese O-ring manufacturers ensure quality through rigorous quality control processes. Companies like Tianjin King Seal have over 70 QC staff to check every product before shipping, and they offer after-sales service to resolve any issues promptly. They also use advanced instruments like thickness gauges and hardness testers to ensure the dimensions and quality of the products.

What payment and shipping options are available when ordering O-rings from Chinese factories?

When ordering O-rings from Chinese factories, you have several payment and shipping options. Payment methods often include T/T, PayPal, Western Union, and Alibaba Trade Assurance. For shipping, options range from express services like DHL, UPS, and FedEx to air and sea freight, with terms such as FOB, CIF, and Ex-works available depending on the customer’s preferences.