5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals

5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals

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🔍 Versatile 5mm NBR O-Rings for Medium-Duty Sealing Applications

Meet your go-to sealing solution for a wide range of projects! Our 5mm Cross Section NBR O-Rings offer the perfect balance of size and performance for medium-duty applications. Made from premium Nitrile Rubber (Buna-N), these reliable seals provide excellent resistance to oils, fuels, water, and wear, making them ideal for automotive, industrial, and home repair projects.

🌟 Optimal Thickness: The 5mm cross-section provides superior sealing performance for medium-pressure systems while remaining flexible enough for easy installation. Perfect for pumps, valves, and automotive components where reliability is key!

📋 Technical Specifications for 5mm NBR O-Ring Seals

Material Nitrile Rubber (NBR / Buna-N) – Excellent resistance to oils, fuels, greases, and hydraulic fluids, making it ideal for automotive and industrial use.
Cross Section (Thickness) 5mm (0.197") – Medium-duty profile that offers great sealing performance with good flexibility for various applications.
Outer Diameter (OD) Range 81mm (3.19") to 420mm (16.54") – Covers a wide range of medium-sized applications from automotive to industrial equipment.
Hardness (Durometer) Shore 70A – Provides an optimal balance of sealing force and flexibility for most medium-duty applications.
Temperature Range -40°F to +248°F (-40°C to +120°C) – Suitable for most environmental conditions from cold winters to hot summers.
Key Features Excellent oil and fuel resistance, good abrasion resistance, water resistance, reliable sealing performance, and a cost-effective solution for various sealing needs.

🛠️ Common Applications for 5mm NBR O-Ring Seals

These versatile 5mm O-rings are perfect for a wide variety of sealing applications across different industries:

  • 🚗 Automotive Systems: Power steering pumps, fuel system components, engine gaskets, transmission seals, and brake system components.
  • 💧 Pumps & Fluid Systems: Water pumps, hydraulic pumps, pressure washers, filtration systems, and irrigation equipment seals.
  • 🚿 Plumbing & Appliances: Faucet seals, valve stems, dishwasher components, and washing machine connections.
  • 🏭 Industrial Equipment: Hydraulic cylinders, pneumatic valves, compressor seals, and general machinery maintenance.
  • 🔧 DIY & Workshop Projects: Perfect for hobbyists, mechanics, and technicians working on equipment repair and maintenance tasks.

❓ Frequently Asked Questions About 5mm NBR O-Ring Seals

Are these 5mm O-rings suitable for fuel system applications? ⛽

Yes, absolutely. NBR (Nitrile) rubber is renowned for its excellent resistance to petroleum-based products. These 5mm fuel-resistant O-rings work well with gasoline, diesel, engine oils, and transmission fluids, making them an excellent choice for automotive fuel systems and related applications.

How do I choose between 5mm and 7mm O-rings for my project? 📏

The choice depends on your application's requirements. 5mm O-rings are ideal for medium-pressure systems where space is limited and flexibility is important. 7mm O-rings offer higher extrusion resistance for high-pressure applications and better compensation for wear. For most automotive and general industrial applications, 5mm provides an excellent balance of performance and ease of installation.

Can these handle hot water in plumbing applications? ♨️

Yes. With a maximum temperature rating of 248°F (120°C), these 5mm NBR O-rings are perfectly suitable for domestic hot water systems, dishwashers, washing machines, and other plumbing applications involving heated water. They maintain their sealing properties well within this temperature range.

What's the difference between NBR and silicone O-rings? 🤔

NBR (Nitrile) offers excellent resistance to oils, fuels, and greases, making it ideal for automotive and industrial use. Silicone has better high-temperature resistance (up to 400°F+) and is more flexible, but has poor resistance to petroleum products. For oil-based applications, 5mm NBR O-rings are the superior choice; for high-temperature food-grade applications, silicone might be better.

Do these come in a kit or individual sizes? 📦

We offer both options to suit your needs. You can purchase individual 5mm O-ring sizes for specific repairs or maintenance tasks. We also offer value kits containing multiple popular sizes from our 81-420mm OD range, perfect for workshops, maintenance departments, or DIY enthusiasts who want to have various sizes on hand.