Nitrile (Buna-N / NBR) O-Rings – Oil-Resistant, Durable & Budget-Friendly Seals

  • 0 MOQ
  • 3 DAYS DELIVERY
  • 100% customer repurchase rate

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Nitrile (Buna-N / NBR) O-Rings – Oil-Resistant, Durable & Budget-Friendly Seals

Nitrile O-Rings (also known as Buna-N O-Rings or NBR O-Rings) are valued for their exceptional resistance to oils, fuels, and wear, making them a popular choice in automotive, hydraulic, pneumatic, and industrial applications. Whether you need bulk production or small-batch custom orders, Hengoseal delivers high-quality Nitrile rubber sealing solutions with fast lead times and no minimum order quantity.

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Jose
Jose
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I've been working with Hengoseal for over three years, and it's been a great experience throughout. Their product quality is consistently reliable, the pricing is reasonable, and they always deliver on time. Even when I have smaller orders, they’re very supportive — which I truly appreciate.

Product Details

温度範囲

-40°C to +100°C (up to +120°C with special grades)
Media Compatibility

Excellent resistance to petroleum-based lubricants, fuels, and mineral oils
制限事項

Not recommended for use with strong oxidizing agents, chlorinated hydrocarbons, or aromatic hydrocarbons
Colors

Black, brown, blue, green, and custom shades available

Nitrile (Buna-N / NBR) O-Rings Key Features & Benefits

  • Excellent Oil Resistance – Reliable sealing against gasoline, diesel, lubricating oils, and other petroleum-based fluids

  • コスト効率が高い – More economical than premium elastomers like Viton® while still providing dependable performance

  • Abrasion Resistant – Suitable for long-term use in dynamic applications

  • Available in Various Hardness Levels – Shore A 40–90 to match different sealing pressures and conditions

  • Custom Colors – Black, brown, blue, green, and custom shades available

Nitrile (Buna-N / NBR) O-Rings Typical Applications

  • Automotive fuel, oil, and gearbox seals

  • 油圧および空気圧システム

  • Industrial machinery using petroleum-based fluids

  • O-Ring kits for maintenance and service (bulk NBR O-Ring sets)

  • Affordable sealing for high-volume OEM requirements

Comparison: NBR vs. Other Common Materials

材料 耐油性 耐熱性 耐薬品性 料金 一般的な用途
NBR/Buna-N 高い 中くらい 中くらい 低い Hydraulic seals, fuel seals
HNBR 高い 高い 高い 中くらい High-temp hydraulic seals
FKM/Viton® 素晴らしい 素晴らしい 高い 高い Aerospace, chemical seals
EPDM 低い 中くらい 高い 中くらい Water and steam sealing

Related Resources for O-Ring Buyers

Nitrile (Buna-N / NBR) O-Rings よくある質問 

  1. Are Nitrile O-Rings and Buna-N O-Rings different?
    No, Buna-N is simply another name for NBR.

  2. What is the temperature range of NBR O-Rings?
    Standard NBR handles -40°C to +100°C, with special grades up to +120°C.

  3. Are NBR O-Rings food-grade?
    Standard NBR is not food-safe, but FDA-compliant versions are available.

  4. How do I choose between NBR and Viton® O-Rings?
    Choose NBR for cost-effective oil resistance; choose Viton® for high heat and chemical resistance.

  5. Do you offer colored NBR O-Rings?
    Yes, we provide multiple standard and custom colors.

  6. Can you supply NBR O-Ring kits?
    Yes, assorted kits are available for maintenance and repair needs.

  7. What is the lead time?
    Stock ships within 3 days; custom orders in 10–15 days.

  8. Is there a minimum order quantity?
    No, we support orders with no MOQ.

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