O-RING · NBR
O-ring 85 × 4 mm · NBR 70 · 21A7
O-ring with an inside diameter of 85 mm and a cross-section of 4 mm (85x4), in NBR 70 Shore A to NF L 17-121 (material code 21A7). Nominal outside diameter 93 mm, weight 4.287 g. Reference 5331-14-306-7473.
| Oringaero reference | OA-21A7-85X4 |
|---|---|
| Material code | 21A7 — NBR |
| Material standard | NF L 17-121 |
| Hardness | 70 Shore A |
| Inside Ø | 85 ± 0.66 mm |
| Cross-section | 4 ± 0.10 mm |
| Nominal outside Ø | 93 mm |
| Colour | Black |
| Weight | 4.287 g |
| Continuous temperature¹ | −20 to +120 °C |
| Short-term temperature¹ | −20 to +140 °C |
| Tolerances | ISO 3601-1:2012 — class A, annex A |
| Surface imperfections | ISO 3601-3:2005 + Amd 1:2018 — grade N |
| Reference | 5331-14-306-7473, 5331-14-602-8861 |
¹ Service temperatures to NF L 17-121; the short-term temperature applies to brief exposure.
- Manufacturer: JUNGA Ltd, EN 9100 certified
- Lead time: 2 to 4 weeks depending on quantity
- Packaging: individual bags, labelled to NF L
- Price: on quotation; state the conformity documents you need
Application and inspection
Petroleum fuels and some diester lubricants.
Values measured at qualification of compound 21A7: tensile strength 20.4 MPa, elongation at break 366 %, compression set 20.5 % (70 h at 125 °C), density 1.22 g/cm³.