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Discover the perfect balance of flexibility and durability with our 1.9mm cross-section NBR O-rings. These precision-engineered seals feature an optimal profile that provides reliable sealing while remaining easy to install in various applications. Crafted from high-quality Nitrile Rubber (NBR/Buna-N), these oil-resistant seals deliver exceptional performance against fuels, oils, and hydraulic fluids, making them ideal for automotive, industrial, and plumbing applications.
🌟 Key Benefit: The balanced 1.9mm cross-section offers the perfect compromise between sealing force and flexibility. With an outer diameter range of 25mm to 140mm and a temperature tolerance from -40°F to +248°F (-40°C to +120°C), these NBR rubber seals are versatile enough for most general-purpose sealing needs.
| Specification | Detail |
|---|---|
| Material | Nitrile Rubber (NBR, Buna-N) |
| Cross Section | 1.9mm (Balanced Profile) |
| Outer Diameter (OD) Range | 25mm to 140mm (Most Common Sizes) |
| Hardness (Durometer) | Shore 70A (Ideal for General Applications) |
| Temperature Range | -40°F / -40°C to +248°F / +120°C |
| Pressure Rating | Medium Pressure Applications (Up to 1000 PSI) |
Superior performance with petroleum-based oils, fuels, hydraulic fluids, and many industrial chemicals.
1.9mm cross-section provides the perfect combination of sealing force, flexibility, and extrusion resistance.
Reliable performance from -40°F to +248°F, suitable for most automotive and industrial environments.
Balanced thickness allows for straightforward installation without excessive stretching or force.
The versatile 1.9mm O-rings are engineered for a wide range of sealing challenges:
Why choose a 1.9mm cross-section O-ring instead of 2mm or 1.5mm? 📏
The 1.9mm thickness represents the optimal balance for most general-purpose applications. It provides slightly more material than a 1.5mm O-ring for better extrusion resistance in medium-pressure applications, while remaining more flexible and easier to install than a 2mm O-ring. This makes it the "Goldilocks" size - just right for most common sealing tasks.
What pressure can these NBR O-rings handle? 🔧
With proper groove design, these 1.9mm NBR seals can handle medium-pressure applications up to approximately 1000 PSI. This covers most automotive systems, hydraulic tools, and industrial equipment. For higher pressure applications, consider our thicker cross-section options, but for the majority of uses, 1.9mm provides excellent performance.
Are these suitable for fuel system applications? ⛽
Yes, absolutely. NBR material is specifically formulated for excellent resistance to petroleum-based fluids. These 1.9mm O-rings are perfect for gasoline, diesel, and oil applications. They're commonly used in fuel line connectors, fuel filters, and other automotive fuel system components.
How do I select the correct groove size for a 1.9mm O-ring? 🔍
For optimal performance with a 1.9mm cross-section, the groove width should be approximately 2.3mm to 2.8mm (about 20-30% wider than the O-ring). The groove depth should provide about 10-30% compression of the O-ring's cross-section when installed. Always refer to standard O-ring groove design charts for precise dimensions based on your specific application.
Do you offer O-ring kits with multiple sizes? 📦
Yes! We offer comprehensive O-ring assortment kits that include the most popular sizes from our 25mm to 140mm range with the 1.9mm cross-section. These kits are perfect for repair technicians, maintenance professionals, and serious DIY enthusiasts who need various sizes readily available. Check our store for current kit options.
