# O-ring 494x7.5 mm NBR 80 · 20A8 NF L 17-120 | Oringaero

Source: https://oringaero.fr/en/produits/20a8-494x7-5.html

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1. O-ring2. Drawing[Open the PDF drawing ↗](https://oringaero.fr/plans/Plan_20a8-494x7-5_494x7.5_20A8.pdf)O-RING · NBR

# O-ring 494 × 7.5 mm · NBR 80 · 20A8

O-ring with an inside diameter of 494 mm and a cross-section of 7.5 mm (494x7.5), in NBR 80 Shore A to NF L 17-120 (material code 20A8). Nominal outside diameter 509 mm, weight 89.789 g.

Oringaero reference | OA-20A8-494X7.5 | 

Material code | [20A8 — NBR](https://oringaero.fr/en/matieres/20A8.html) | 

Material standard | NF L 17-120 | 

Hardness | 80 Shore A | 

Inside Ø | 494 ± 2.54 mm | 

Cross-section | 7.5 ± 0.15 mm | 

Nominal outside Ø | 509 mm | 

Colour | Black | 

Weight | 89.789 g | 

Continuous temperature¹ | −30 to +120 °C | 

Short-term temperature¹ | −30 to +140 °C | 

Tolerances | ISO 3601-1:2012 — class A, annex A | 

Surface imperfections | ISO 3601-3:2005 + Amd 1:2018 — grade N | 

¹ Service temperatures to NF L 17-120; the short-term temperature applies to brief exposure.

QuantityAdd to my request
- 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

Mineral-based or synthetic-hydrocarbon hydraulic fluids.

Values measured at qualification of compound 20A8: tensile strength 18.3 MPa, elongation at break 225 %, compression set 29.3 % (70 h at 125 °C), density 1.29 g/cm³.

[Tolerances, surface imperfections and storage →](https://oringaero.fr/en/normes.html)

## Explore this material

[Properties and temperatures: 20A8](https://oringaero.fr/en/matieres/20A8.html)
[Browse all dimensions](https://oringaero.fr/en/catalogue/20a8-1.html)
- [O-ring 493 × 7 mm · 20A8](https://oringaero.fr/en/produits/20a8-493x7.html)

- [O-ring 494.16 × 6.99 mm · 20A8](https://oringaero.fr/en/produits/20a8-494-16x6-99.html)

- [O-ring 495 × 3 mm · 20A8](https://oringaero.fr/en/produits/20a8-495x3.html)

Adjacent catalogue sizes are not interchangeable; confirm dimensions and suitability.