40mm ID x 1.5mm C/S (43mm OD) FKM O Ring
£0.20 – £1.50 / each
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each
total
263 in stock, ready for shipping today.
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FKM (Fluoroelastomer / Viton®) O Rings
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38mm ID x 3mm C/S (44mm OD) FKM O Ring
£0.24 – £1.57 / each
Waseach totalView specification59 in stock, ready for shipping today.
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80mm ID x 3mm C/S (86mm OD) FKM O Ring
£1.43 – £7.14 / each
Waseach totalView specification239 in stock, ready for shipping today.
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115mm ID x 2.5mm C/S (120mm OD) FKM O Ring
£1.32 – £6.60 / each
Waseach totalView specification6 in stock, ready for shipping today.
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7mm ID x 2.5mm C/S (12mm OD) FKM O Ring
£0.04 – £0.68 / each
Waseach totalView specification1302 in stock, ready for shipping today.
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19.5mm ID x 3mm C/S (25.5mm OD) FKM O Ring
£0.10 – £1.26 / each
Waseach totalView specification647 in stock, ready for shipping today.
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BS115 FKM O Ring - 17.12mm ID x 2.62mm C/S (22.36mm OD)
£0.08 – £1.04 / each
Waseach totalView specification656 in stock, ready for shipping today.
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BS203 FKM O Ring - 7.52mm ID x 3.53mm C/S (14.58mm OD)
£0.08 – £1.00 / each
Waseach totalView specification1244 in stock, ready for shipping today.
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22mm ID x 3mm C/S (28mm OD) FKM O Ring
£0.16 – £1.60 / each
Waseach totalView specification768 in stock, ready for shipping today.
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BS004 FKM O Ring - 1.78mm ID x 1.78mm C/S (5.34mm OD)
£0.02 – £0.50 / each
Waseach totalView specification352 in stock, ready for shipping today.
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BS005 FKM O Ring - 2.57mm ID x 1.78mm C/S (6.13mm OD)
£0.03 – £1.00 / each
Waseach totalView specification284 in stock, ready for shipping today.
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28mm ID x 2mm C/S (32mm OD) FKM O Ring
£0.20 – £1.57 / each
Waseach totalView specification235 in stock, ready for shipping today.
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About FKM (Fluoroelastomer / Viton®) O Rings
Looking for high-performance O-rings that thrive under heat and chemical pressure? FKM O-rings — also commonly known by the brand name Viton® — are your go-to solution for extreme sealing conditions.
What is FKM?
FKM stands for fluoroelastomer, a premium synthetic rubber designed to withstand:
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Temperatures from –20 °C up to +200 °C (with peaks of 230 °C in some compounds)
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Chemicals like fuels, oils, acids, and solvents
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Ozone, UV and weathering over long periods
This makes them ideal for automotive, aerospace, chemical processing, and high-temperature industrial applications.
FKM vs. NBR / Silicone: What's the Difference?
| Feature | FKM (Viton®) | NBR (Nitrile) | Silicone |
|---|---|---|---|
| Temp Range | –20 °C → +200–250 °C | –40 °C → +120 °C | –50 °C → +200 °C |
| Chemical Resistance | Excellent (fuels, oils, solvents) | Moderate | Poor (especially fuels) |
| Ozone/UV Resistance | Excellent | Poor | Excellent |
| Durability / Cost | High durability, higher cost | Budget friendly | Flexible, mid-price |
Not sure what to choose? Get in touch and we’ll help!
Common Uses of FKM O-Rings
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Fuel injectors & turbo kits
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Industrial pumps and valves
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High-performance engines
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Chemical sealing and lab equipment
Contact us
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