5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals

5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals

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🔍 About Our Heavy-Duty 5mm NBR O-Rings

Meet the heavy-duty sealing solution for your large-scale projects! Our professional-grade 5mm NBR O-Rings are engineered for demanding applications where a robust, reliable seal is critical. Made from premium Nitrile Rubber (NBR/Buna-N), these large-diameter O-rings deliver exceptional resistance to oils, fuels, and hydraulic fluids, combined with superior durability and elasticity to withstand high-pressure environments.

🌟 Key Benefit: Designed for larger grooves and connections, this 5mm cross-section O-ring provides a more substantial seal for industrial equipment, heavy machinery, and large hydraulic systems, with a reliable temperature range from -40°F to +248°F (-40°C to +120°C).

📋 Technical Specifications for 5mm Heavy-Duty O-Rings

Specification Detail
Material Nitrile Rubber (NBR, Buna-N)
Cross Section (Cord Thickness) 5.0mm (Heavy-Duty)
Outer Diameter (OD) Range 200mm to 420mm (Large Sizes Available)
Hardness (Durometer) Shore 70A (Optimal for Industrial Sealing)
Temperature Range -40°F / -40°C to +248°F / +120°C
Primary Features Excellent Oil & Fuel Resistance, High Abrasion Resistance, Good Compression Set, Ideal for Hydraulic & Pneumatic Systems

🛠️ Industrial & Commercial Applications

These heavy-duty 5mm O-rings are built for serious sealing tasks in commercial and industrial settings:

  • 🏭 Industrial Hydraulic Systems: Sealing for large hydraulic cylinders, presses, and manufacturing equipment.
  • 🚜 Agricultural & Construction Machinery: Reliable seals for tractor hydraulics, excavators, and loaders.
  • ⚙️ Large Pumps & Compressors: Critical seals for industrial water pumps, air compressors, and fluid transfer systems.
  • 🛢️ Fuel Storage & Transfer Equipment: Effective sealing for larger fuel lines, tanks, and dispensers.
  • 🔩 Custom Fabrication & Large Equipment Repair: The perfect seal for machine shops, maintenance teams, and OEM replacements.

❓ Frequently Asked Questions About Large 5mm O-Rings

Why choose a 5mm cross-section O-ring over a thinner one? 📏

A 5mm thick O-ring provides greater material volume and sealing force, making it ideal for applications with wider grooves, higher pressures, or where extra durability is needed to resist extrusion and wear. It's the preferred choice for heavy-duty industrial seals and larger diameter connections.

Are these large NBR O-rings suitable for hydraulic systems? 🔧

Yes, absolutely. The combination of a 5mm cross-section and oil-resistant NBR material makes these seals excellent for hydraulic and pneumatic applications. They can handle standard hydraulic fluids (like HLP), lubricants, and resist the pressures common in industrial machinery.

How do I measure for a large O-ring replacement? 🧰

For large seals, accuracy is key. Measure the groove width to confirm it accepts a 5mm cross-section. Then, measure either the groove's Inner Diameter (ID) or Outer Diameter (OD) precisely. Our sizes are listed by OD (200mm-420mm). If your groove is worn, consider measuring the old seal if it's intact.

What's the temperature limit for these industrial O-rings? ♨️

These NBR rubber seals perform reliably from -40°F to +248°F (-40°C to +120°C). This covers most industrial fluid temperatures. For continuous operation above 250°F, specialized materials like FKM (Viton®) may be recommended.

Do you offer specific large sizes or custom O-ring diameters? 🔩

We stock a comprehensive range of large diameter O-rings from 200mm to 420mm OD with a 5mm cross-section. For custom sizes outside this range or for volume OEM quotes, please contact our industrial sales team directly.