O-RING · NBR
O-ring 28 × 3 mm · NBR 70 · 21A7
O-ring with an inside diameter of 28 mm and a cross-section of 3 mm (28x3), in NBR 70 Shore A to NF L 17-121 (material code 21A7). Nominal outside diameter 34 mm, weight 0.840 g. Reference 5331-14-010-1032.
| Oringaero reference | OA-21A7-28X3 |
|---|---|
| Material code | 21A7 — NBR |
| Material standard | NF L 17-121 |
| Hardness | 70 Shore A |
| Inside Ø | 28 ± 0.25 mm |
| Cross-section | 3 ± 0.08 mm |
| Nominal outside Ø | 34 mm |
| Colour | Black |
| Weight | 0.840 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 | 5331-14-010-1032, 5331-14-303-7066 |
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.