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This O-ring 31.47x1.78 - NBR - Nitrile - 70 Shore A - Black - FDA / NSF61 - ORS171957 offers excellent resistance to mineral oils, greases, hydraulic fluids, and fuels, making it suitable for various industrial applications.
Manufactured from NBR (nitrile butadiene rubber), also known as Nitrile rubber, with a hardness of 70 Shore A, this NBR O-ring, with an inner diameter (ID) of 31,47mm and a cross-section (CS) of 1,78mm, provides excellent resistance to oils, greases, and fuels. This makes the material ideal for use in the general, hydraulic, and pneumatic industries.
✅ Excellent resistance to oils, greases, and mineral oils
✅ Temperature resistant from -30°C to +135°C
✅ Resistant to aliphatic hydrocarbons and hydraulic oils H, H-L, H-LP
✅ Wear-resistant and durable – longer lifespan and reduced maintenance
✅ Good mechanical properties – maintains flexibility under pressure
This O-ring 31,47x1,78 NBR 70 is ideal for applications in the general, hydraulic, and pneumatic industries. It is commonly used in pumps, compressors, hydraulic cylinders and pumps, pneumatic cylinders, and air pressure regulators due to its excellent resistance to oils and greases.
You can easily order this O-ring 31.47x1.78 - NBR - Nitrile - 70 Shore A - Black - FDA / NSF61 - ORS171957 online from our webshop O-ring-stocks.eu, the Global O-ring Webshop
This NBR - Nitrile O-Ring has a diameter of 31.47x1.78 mm and is Black in color. The hardness of this O-ring 31.47x1.78 - NBR - Nitrile - FDA - NSF 61 - 70 Shore A - Black - ORS171957 is 70. Alternative names for the compound are Nitrile Rubber - NBR, and it is commonly produced by Perbunan® | Krynac® | Nipol® | Europrene N® | Breon® | Chemigum® | Nysyn® | Kalar®. The O-Ring is typically used in and has an operating temperature range from -30 ºC to 100 ºC. O-Rings 1297234 are referred to as 171957 and have a DIN 3771 size of 31.47x1.78. This item is equivalent to and has an FDA - NSF 61 approval. The chemical name of this O-Ring is Acrylonitril-Butadiën-Copolymeer / Buna-N.
| Article number | 171957 |
| General Specifications | |
| Seal type | O-ring |
| ID (Inner diameter) | 31.47 mm |
| CS (Cross Section) | 1.78 mm |
| Dimensions | 31.47x1.78 |
| Material | NBR - Nitrile |
| Approval | FDA - NSF 61 |
| Hardness | 70 |
| Color | Black |
| Compound Number | 107019011 |
| O-ring Code | 026 |
| Alternative Sizes | |
| AS568 Size Chart | AS568 026 |
| BS1806 Size Chart | BS1806 026 |
| DIN 3771 Size Chart | 31.47x1.78 |
| ISO 3601 Size Chart | 31.47x1.78 |
| SMS 1586 Size chart | 31.47 x 1.78 |
| Size in text | thirty-one point forty-seven millimeters by one point seventy-eight millimeters |
| Technical Specifications | |
| Temperature Max | 100 ºC |
| Temperature Min | -30 ºC |
| Food Contact & Sanitary Certifications | |
| FDA 21 CFR 177.2600 | ✔ |
| Drinking Water & Potable Water Certifications | |
| NSF 61 | ✔ |
| Other Specifications | |
| Alternative names | Nitrile Rubber - NBR |
| Chemical Name | Acrylonitril-Butadiën-Copolymeer / Buna-N |
| Description 2 | O-ring NBR - Nitrile 31.47x1.78 |
| Product name | O-ring 31.47x1.78 Nitrile NBR |
| Trade names | Perbunan® | Krynac® | Nipol® | Europrene N® | Breon® | Chemigum® | Nysyn® | Kalar® |
| Also found under | |
| NBR - Nitrile O-rings | O-rings | |
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