Metric Size O-Rings – ISO/DIN Standard Sealing Solutions
Metric Size O-Rings are high-precision sealing components manufactured to meet ISO 3601 and DIN 3771 metric standards. They ensure reliable sealing performance in a wide range of industrial, automotive, plumbing, and household applications. Their precise dimensions guarantee leak-free operation, extended service life, and seamless compatibility with standard metric fittings and grooves.
As a leading B2B supplier of industrial sealing components, Xiamen Best Seal offers a comprehensive range of metric O-rings in over 10,000 standard sizes, plus full customization services for non-standard dimensions, materials, and hardness specifications. Our metric O-rings deliver consistent performance across hydraulic systems, pneumatic equipment, automotive assemblies, and general machinery.
ISO 3601 & DIN 3771 Compliance
Precision Metric DimensioningMetric O-rings are designed with millimeter-based sizing (e.g., 10mm ID × 2mm CS) rather than fractional inches, ensuring perfect fit in European and Asian machinery that follows metric engineering standards.
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Key Benefits & Custom Capabilities
Compliant with ISO 3601 and DIN 3771 metric dimensions for global compatibility.
Inner/outer diameter and cross-section tailored to your application needs.
NBR, EPDM, Silicone, FKM, HNBR, and specialty high-performance compounds.
20–90 Shore A, optimized for static or dynamic sealing requirements.
-60°C to +250°C depending on material selection.
PTFE or silicone coating for low-friction and anti-stick properties.
Material Selection Guide
Our Metric O-Rings are available in a comprehensive range of high-performance elastomers. Select the optimal material based on your operating temperature, chemical exposure, and mechanical requirements:
| Material | Abbr. | Hardness | Temp Range | Key Features | Typical Applications |
|---|---|---|---|---|---|
| Nitrile Rubber | NBR | 30–90 Shore A | -40°C ~ +120°C | Excellent oil/fuel resistance, cost-effective | Hydraulic systems, General machinery |
| Ethylene Propylene | EPDM | 40–90 Shore A | -50°C ~ +150°C | Superior weather/water/steam resistance | Plumbing, HVAC, Brake systems |
| Silicone | VMQ | 20–90 Shore A | -60°C ~ +230°C | Wide temp range, food-grade options | Food/beverage, Medical devices |
| Fluorocarbon | FKM (Viton®) | 50–90 Shore A | -20°C ~ +250°C | Excellent heat/chemical/oil resistance | Automotive engines, Chemical pumps |
| Hydrogenated Nitrile | HNBR | 50–90 Shore A | -40°C ~ +150°C | Enhanced heat/oil resistance vs. NBR | Automotive A/C, Oilfield equipment |
| Chloroprene | CR (Neoprene®) | 50–80 Shore A | -40°C ~ +100°C | Good weather/refrigerant resistance | Refrigeration, Marine sealing |
| Fluorosilicone | FVMQ | 40–80 Shore A | -60°C ~ +180°C | Fuel resistance + low-temp flexibility | Aircraft fuel systems, Aerospace |
| Polyacrylate | ACM | 50–80 Shore A | -20°C ~ +150°C | Excellent hot oil resistance | Automotive transmissions, Engine seals |
| Carboxylated Nitrile | XNBR | 70–95 Shore A | -30°C ~ +100°C | High abrasion resistance | High-pressure seals, Industrial rollers |
| Perfluoroelastomer | FFKM | 60–90 Shore A | -30°C ~ +320°C | Universal chemical resistance | Chemical processing, Semiconductor |
| Butyl Rubber | IIR | 40–75 Shore A | -40°C ~ +120°C | Excellent gas impermeability | Vacuum seals, Pharmaceutical stoppers |
| Natural Rubber | NR | 30–80 Shore A | -60°C ~ +80°C | Highest tensile strength, excellent elasticity | Shock mounts, Elastic gaskets |
Product Advantages
✬ * Why Choose Our Metric O-Rings?
- Long Service Life – High elasticity and chemical resistance ensure stable performance and minimal degradation over time
- Superior Sealing Effect – Maintains tight sealing even under high pressure and extreme temperature fluctuations
- Dimensional Precision – Manufactured to ISO/DIN tolerances (±0.10mm to ±0.25mm depending on size)
- Global Compatibility – Metric sizing ensures seamless integration with European and Asian machinery
- Environmentally Compliant – All materials meet RoHS and REACH standards for environmental safety
☾. ° Xiamen Best Seal Manufacturing Strength
- 10,000+ Molds Available – Extensive mold library to meet diverse size and material requirements
- No MOQ, Starts from One Piece – Flexible customization from sample testing to bulk production
- In-Stock Inventory – Standard sizes in stock for immediate shipment, ensuring fast global delivery
- Precision Inspection – 100% dimensional verification using automated optical measurement systems
- Quality Assurance – Meets 125°C/1008H high-temperature aging test requirements for new energy applications
Industrial Applications
Metric O-Rings provide reliable sealing performance without deformation or leakage across diverse industrial sectors:
Prevent water leakage in pipe joints, faucets, and valve assemblies.
Essential for hydraulic and pneumatic sealing in industrial machinery.
Suitable for engine, fuel injection, brake, and transmission systems.
Replacement parts for pressure washers, pumps, and DIY equipment.
Quality Testing & Compliance
Automated optical measurement ensures zero-defect quality and ISO tolerance compliance.
Meets 125°C/1008H aging test requirements for new energy industry applications.
Withstands commercial cleaners (alcohols, alkalis, oils) per industry standards.
Packaging & Shipping
📦 Packaging Options
We provide flexible packaging solutions based on product size, order quantity, protection requirements, and customer preferences. Both standard and special packaging options are available to ensure safe delivery and convenient handling.
| Category | Packaging Type |
|---|---|
| Standard Packaging | Large Poly Bags (Bulk Distribution) |
| Small PE Bags (Inventory Ready) | |
| Foam / Bubble Protective Layering | |
| Special Packaging | Blister Packaging (Retail/Clean-room Ready) |
| Inflatable Shock-Proof Packaging | |
| Heat Shrink Film + Cardboard Reinforcement | |
| Sleeve Packaging (Protective tube for delicate sizes) | |
| Customization Available: Labels, Part Numbers, Barcodes, Batch Info, or Customer Branding. | |
🚚 Shipping & Logistics
We offer multiple shipping methods with flexible delivery options to meet your project timelines.
| Item | Details |
|---|---|
| MOQ | 1 piece (No minimum order quantity) |
| Lead Time | In stock: Shipped within 3 days | Out of stock: 7–15 days | New mold: Sample in 10-20 days |
| Shipping Methods | Express (DHL / FedEx / UPS), Air Freight, Sea Freight |
| Delivery Time | Express: 3–5 days | Air: 5–7 days | Sea: 25–45 days |
| Trade Terms | EXW, FOB Xiamen, CIF, DDP available |
| Shipping Port | Xiamen Seaport / Xiamen Airport, China |
| Sample Policy | Samples available; customer pays freight cost |
💡 Secure & Reliable Delivery:
All metric O-rings are packed to prevent contamination, deformation, and surface damage, ensuring your components arrive in optimal condition for immediate use or assembly.
Certificates & Compliance
🏆 Quality Standards: ISO 9001:2015, ISO 3601, DIN 3771, RoHS 2.0, REACH Compliant
⚙️ Material Testing: ASTM D2000, Hardness (Shore A), Compression Set, Tensile Strength reports available per batch.
Contact Us for Custom Solutions
Xiamen Best Seal Imp and Exp Co., Ltd
Tel: +86-592-5782315
Mobile: +86 189 5015 9396
Email: yunying2@bestsealhk.com
Address: Unit 522-525, Gaodian Road 6#, Huli District, Xiamen, China
Why choose us?
- We follow strict manufacturing protocols to ensure consistency in our Solid O-ring products.
- Our company has rich production experience, we create extraordinary quality.
- Our Solid O-ring products are subject to rigorous testing to ensure optimal performance.
- Everywhere quality, the implementation of the production line is our quality policy. We strictly control the quality and strive to make every customer receive the best quality products and services.
- Our focus is on producing Solid O-ring products that are efficient and cost-effective.
- Our company has a group of experienced employees, with scientific product positioning design, high quality and low price Metric Size O-ring.
- Our Solid O-ring products come in a variety of sizes and materials, tailored to suit our customers' needs.
- Our company promotes open and transparent cooperation with customers with innovative design and production methods. Modern equipment allows us to deliver high-quality orders efficiently and swiftly. If you have any needs, our professionals will work hard to help you achieve them.
- We understand the importance of timely delivery of Solid O-ring products and strive to meet our customers' expectations.
- The development and utilization of new Metric Size O-ring will reduce the production cost, improve the economic efficiency of the enterprise and enhance the competitiveness of the enterprise.
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