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
- Available to order
O-ring 29.74×2.95 NBR 90 Shore A
- Dimensions
- 29.74 × 2.95 mm · OD 35.64 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-29-74x2-95
€0.33excl. VAT
- Available to order
O-ring 29.75×3.53 NBR 90 Shore A
- Dimensions
- 29.75 × 3.53 mm · OD 36.81 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-29-75x3-53
€0.33excl. VAT
- Available to order
O-ring 29.82×2.62 NBR 90 Shore A
- Dimensions
- 29.82 × 2.62 mm · OD 35.06 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-29-82x2-62
€0.33excl. VAT
- Available to order
O-ring 29.87×1.78 NBR 90 Shore A
- Dimensions
- 29.87 × 1.78 mm · OD 33.43 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-29-87x1-78
€0.17excl. VAT
- Available to order
O-ring 29×2.5 NBR 90 Shore A
- Dimensions
- 29 × 2.5 mm · OD 34 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-29x2-5
€0.33excl. VAT
- Available to order
O-ring 29×2 NBR 90 Shore A
- Dimensions
- 29 × 2 mm · OD 33 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-29x2
€0.33excl. VAT
- Available to order
O-ring 29×3.5 NBR 90 Shore A
- Dimensions
- 29 × 3.5 mm · OD 36 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-29x3-5
€0.33excl. VAT
- Available to order
O-ring 29×3 NBR 90 Shore A
- Dimensions
- 29 × 3 mm · OD 35 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-29x3
€0.33excl. VAT
- Available to order
O-ring 30.3×2.4 NBR 90 Shore A
- Dimensions
- 30.3 × 2.4 mm · OD 35.1 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-30-3x2-4
€0.33excl. VAT
- Available to order
O-ring 30.8×3.6 NBR 90 Shore A
- Dimensions
- 30.8 × 3.6 mm · OD 38 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-30-8x3-6
€0.67excl. VAT
- Available to order
O-ring 30×1.5 NBR 90 Shore A
- Dimensions
- 30 × 1.5 mm · OD 33 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-30x1-5
€0.17excl. VAT
- Available to order
O-ring 30×1 NBR 90 Shore A
- Dimensions
- 30 × 1 mm · OD 32 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-30x1
€0.33excl. VAT
- Available to order
O-ring 30×2.5 NBR 90 Shore A
- Dimensions
- 30 × 2.5 mm · OD 35 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-30x2-5
€0.33excl. VAT
- Available to order
O-ring 30×2 NBR 90 Shore A
- Dimensions
- 30 × 2 mm · OD 34 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-30x2
€0.17excl. VAT
- Available to order
O-ring 30×4 NBR 90 Shore A
- Dimensions
- 30 × 4 mm · OD 38 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-30x4
€0.50excl. VAT
- Available to order
O-ring 30×5 NBR 90 Shore A
- Dimensions
- 30 × 5 mm · OD 40 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-30x5
€0.67excl. VAT
- Available to order
O-ring 31.34×3.53 NBR 90 Shore A
- Dimensions
- 31.34 × 3.53 mm · OD 38.4 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-31-34x3-53
€0.33excl. VAT
- Available to order
O-ring 31.42×2.62 NBR 90 Shore A
- Dimensions
- 31.42 × 2.62 mm · OD 36.66 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-31-42x2-62
€0.33excl. VAT
- Available to order
O-ring 31.47×1.78 NBR 90 Shore A
- Dimensions
- 31.47 × 1.78 mm · OD 35.03 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-31-47x1-78
€0.33excl. VAT
- Available to order
O-ring 31.5×4.5 NBR 90 Shore A
- Dimensions
- 31.5 × 4.5 mm · OD 40.5 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-31-5x4-5
€1.00excl. VAT
- Available to order
O-ring 31×2.5 NBR 90 Shore A
- Dimensions
- 31 × 2.5 mm · OD 36 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-31x2-5
€0.50excl. VAT
- Available to order
O-ring 31×2 NBR 90 Shore A
- Dimensions
- 31 × 2 mm · OD 35 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-31x2
€0.50excl. VAT
- Available to order
O-ring 31×3 NBR 90 Shore A
- Dimensions
- 31 × 3 mm · OD 37 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-31x3
€0.33excl. VAT
- Available to order
O-ring 31×4.5 NBR 90 Shore A
- Dimensions
- 31 × 4.5 mm · OD 40 mm
- Material
- NBR · 90 ShA
Product code OR-NBR90-31x4-5
€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× |