NBR (Nitrile) O-rings
-30 °C to 100 °C
NBR (Nitrile Butadiene Rubber) is the most widespread elastomer for O-rings. Excellent resistance to mineral oils, fuels, and hydraulic fluids. An economical choice for most standard applications.
Products
3,759 products
- In stock
O-ring 26×2 NBR 90 Shore A
- Dimensions
- 26 × 2 mm · OD 30 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-26x2
€0.12excl. VAT
- In stock
O-ring 28.17×3.53 NBR 90 Shore A
- Dimensions
- 28.17 × 3.53 mm · OD 35.23 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-28-17x3-53
€0.34excl. VAT
- In stock
O-ring 30×3.5 NBR 90 Shore A
- Dimensions
- 30 × 3.5 mm · OD 37 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-30x3-5
€0.21excl. VAT
- In stock
O-ring 30×3 NBR 90 Shore A
- Dimensions
- 30 × 3 mm · OD 36 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-30x3
€0.25excl. VAT
- In stock
O-ring 32.92×3.53 NBR 90 Shore A
- Dimensions
- 32.92 × 3.53 mm · OD 39.98 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-32-92x3-53
€0.42excl. VAT
- In stock
O-ring 32×3.5 NBR 90 Shore A
- Dimensions
- 32 × 3.5 mm · OD 39 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-32x3-5
€0.75excl. VAT
- In stock
O-ring 32×4 NBR 90 Shore A
- Dimensions
- 32 × 4 mm · OD 40 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-32x4
€0.63excl. VAT
- In stock
O-ring 33.3×2.4 NBR 90 Shore A
- Dimensions
- 33.3 × 2.4 mm · OD 38.1 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-33-3x2-4
€0.55excl. VAT
- In stock
O-ring 33×3.5 NBR 90 Shore A
- Dimensions
- 33 × 3.5 mm · OD 40 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-33x3-5
€0.15excl. VAT
- In stock
O-ring 34×2 NBR 90 Shore A
- Dimensions
- 34 × 2 mm · OD 38 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-34x2
€0.67excl. VAT
- In stock
O-ring 35×3.5 NBR 90 Shore A
- Dimensions
- 35 × 3.5 mm · OD 42 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-35x3-5
€0.33excl. VAT
- In stock
O-ring 37×3.5 NBR 90 Shore A
- Dimensions
- 37 × 3.5 mm · OD 44 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-37x3-5
€0.39excl. VAT
- In stock
O-ring 38×2 NBR 90 Shore A
- Dimensions
- 38 × 2 mm · OD 42 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-38x2
€0.33excl. VAT
- In stock
O-ring 42×2 NBR 90 Shore A
- Dimensions
- 42 × 2 mm · OD 46 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-42x2
€0.50excl. VAT
- In stock
O-ring 45×2.5 NBR 90 Shore A
- Dimensions
- 45 × 2.5 mm · OD 50 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-45x2-5
€0.42excl. VAT
- In stock
O-ring 46×3 NBR 90 Shore A
- Dimensions
- 46 × 3 mm · OD 52 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-46x3
€0.50excl. VAT
- In stock
O-ring 48.9×2.62 NBR 90 Shore A
- Dimensions
- 48.9 × 2.62 mm · OD 54.14 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-48-9x2-62
€0.69excl. VAT
- In stock
O-ring 48×3 NBR 90 Shore A
- Dimensions
- 48 × 3 mm · OD 54 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-48x3
€1.00excl. VAT
- In stock
O-ring 5.5×1.5 NBR 90 Shore A
- Dimensions
- 5.5 × 1.5 mm · OD 8.5 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-5-5x1-5
€0.17excl. VAT
- In stock
O-ring 50×2 NBR 90 Shore A
- Dimensions
- 50 × 2 mm · OD 54 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-50x2
€0.65excl. VAT
- In stock
O-ring 54×3 NBR 90 Shore A
- Dimensions
- 54 × 3 mm · OD 60 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-54x3
€0.83excl. VAT
- In stock
O-ring 57×3.5 NBR 90 Shore A
- Dimensions
- 57 × 3.5 mm · OD 64 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-57x3-5
€0.42excl. VAT
- In stock
O-ring 59.2×5.7 NBR 90 Shore A
- Dimensions
- 59.2 × 5.7 mm · OD 70.6 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-59-2x5-7
€1.25excl. VAT
- In stock
O-ring 66×3 NBR 90 Shore A
- Dimensions
- 66 × 3 mm · OD 72 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-66x3
€1.00excl. VAT
Temperature and chemical compatibility
Temperature and chemical compatibility
Temperature range: -30 °C to +100 °C (short-term up to +120 °C).
Featured products
Typical applications: hydraulic cylinders, pneumatic systems, pumps, gearboxes, fuel pumps, automotive industry, general engineering.
NBR (Nitrile)
Each elastomer has different mechanical and chemical properties.
NBR (Nitrile) — properties and applications
NBR (nitrile rubber) is the most widely used and most affordable material for O-rings — for most engineering operations it is the standard first choice, with a reference price of 1×. It works in a temperature range of −30 to +100 °C (briefly up to +120 °C) and its typical hardness is 70 ShA, which makes it a universal sealing element for ordinary conditions. It's a reliable workhorse that covers the vast majority of standard seals without any needless overpaying.
NBR shows its strength with petroleum-based substances: it has excellent resistance to mineral oils, hydraulic fluids and fuels (petrol, diesel), and it copes well with water and air too. This is precisely why NBR O-rings are the go-to choice in hydraulics, pneumatics, fuel and oil systems, and general engineering. Its properties depend on the acrylonitrile (ACN) content: a higher proportion improves oil resistance, while a lower one improves flexibility at low temperatures — so for a specific application we select a tailored compound.
It does, however, have clear limits. Don't use NBR for steam and hot water, glycol-based brake fluids (DOT 3/4), ester and synthetic oils, polar solvents, or strong acids and bases. Watch out for ozone, UV and weathering too: in direct sunlight NBR ages and cracks, so it isn't ideal for a permanently outdoor environment. These limitations determine the service life of the seal — with an aggressive medium, don't experiment; choose a more suitable material instead.
Compared with the other materials, NBR is clearly the best price-to-performance ratio for oil and fuel applications at moderate temperatures. When you need a higher temperature or better wear resistance, step up to HNBR; when aggressive chemistry or high heat come into play, to FKM (Viton®); for water and steam, to EPDM. The conclusion is simple: if you're sealing mineral oil, hydraulics or fuel in the −30 to +100 °C range and want a proven O-ring at the best price, reach for NBR — and save the other materials for the cases where NBR runs up against its limits.
Browse all O-rings across every material.
O-ring material comparison
Indicative values for a quick comparison. Temperature ranges are conservative (continuous service); for a specific medium always verify compatibility or consult a technician.
| Material | Temperature range | Mineral oil | Water | Acid | Fuel | Hardness (Sh A) | Relative price (vs NBR) |
|---|---|---|---|---|---|---|---|
| NBR — your selection | -30 – 100 °C | Excellent | Limited | Avoid | Excellent | 70 Sh A | 1.0× |
| HNBR | -30 – 150 °C | Excellent | Limited | Avoid | Excellent | 75 Sh A | 3.0× |
| FKM | -20 – 200 °C | Excellent | Limited | Excellent | Excellent | 75 Sh A | 5.0× |
| FFKM | -20 – 260 °C | Excellent | Excellent | Excellent | Excellent | 75 Sh A | 50.0× |
| EPDM | -40 – 130 °C | Unsafe | Excellent | Excellent | Unsafe | 70 Sh A | 1.2× |
| VMQ | -60 – 200 °C | Avoid | Excellent | Avoid | Avoid | 70 Sh A | 3.5× |
| PU | -40 – 80 °C | Excellent | Limited | Avoid | Limited | 90 Sh A | 2.0× |